Tag Archives: copyright

Request a copy: process and implementation

This blog post looks at a recent feature implemented in our repository called ‘Request a copy’ and discusses the process and management of the service. There is a related blog post which discusses the uptake and reaction to the facility.

As part of our recent upgrade to the University’s institutional repository (now renamed ‘Apollo‘), we implemented a new feature called ‘Request a copy’. ‘Request a copy’ operates on the principle of peer-to-peer sharing – if an item in Apollo is not yet available to the public, a repository user can ask the author for a copy of the item. Authors sharing copies of their work on an individual basis falls outside the publisher’s copyright restrictions; here, the repository is acting as a facilitator to a process which happens anyway – peer to peer sharing.

The main advantage of the ‘Request a copy’ feature is to open up the University’s most current research to a wider audience. Many of our users do not necessarily come from an academic background, or may be based within another discipline, or an institution where journal subscriptions are more limited. The repository is often their first port of call to find new research as it ranks highly in Google search results. We hope that these users will benefit from ‘Request a copy’ by being able to access new outputs early, at researchers’ discretion. Additionally, this may provide an added benefit to researchers by introducing new contacts and potential collaborations.

How it works

Screen Shot 2016-10-06 at 13.53.30Items in Apollo that are not yet accessible to the wider public are indicated by a padlock symbol that appears on the thumbnail image and filename link which users can usually click to download the file.

Reasons why the file may not yet be publicly available include:

  • Some publishers require that articles in repositories cannot be made available until they are published, or until a specified time after publication
  • We hold a number of digitised theses in the repository, and for some we have been unable to contact the author to secure permission to make their thesis available
  • Authors may choose to make their dataset available only once the related article is published

When a user clicks on a thumbnail or filename link containing a padlock, they are directed to the ‘Request a copy’ form. Here, they provide their name, email address and a message to the author. On clicking ‘Request copy’, an email is sent to the person who submitted the article, containing the user’s details. The recipient of this email then has the option to approve or deny the user’s request, to contact the user for more information, or (if they are not the author) to forward the request to the author.

How it really works

In practice, the process is slightly more complicated. For most of the content in the repository, the person who submitted an item will be a member of repository staff, rather than the item’s author. This means that for the most part, emails generated by the ‘Request a copy’ form were initially sent to members of the Office of Scholarly Communication team. In some cases, these requests were sent to people who have left the University, and we have had to query the system to retrieve these emails. As an interim measure, we have now directed all emails to support@repository.cam.ac.uk. These still need manual processing.

Theses

For theses where we have not received permission from the author to make them available, we forward requests to the University Library’s Digital Content Unit, who have traditionally provided digitised copies of theses at a charge of £65. We have  found however, that once information about this charge is communicated to the requester, very few (approximately 1%) actually complete the process of ordering a thesis copy.

We have been working with the Digital Content Unit on a trial where thesis copies were offered at £30, then £15. However, even at these cheaper prices, uptake remained low (it increased to 10%, but due to the small size of the sample, this only equated to two and three requests at each price point, and therefore may not be statistically significant). This indicates that the objection was to being charged at all, rather than to the particular amount. Work in this area remains ongoing to try and offer thesis copies as cheaply as possible to requesters, while allowing the Digital Content Unit to cover their costs.

Articles

If the request is for an article, we first need to check whether the article has actually been published and is already available Open Access. Although we endeavour to keep all our repository records up to date, unless we are informed that an article has been published, repository staff need to check each article for which publication is pending. This is a time-consuming manual process, and when we have a large backlog, sometimes it can take a while before an article is updated following publication.

If we found that the article has indeed been published and can be made Open Access, we amend the record, make the article available and email the requester to let them know they can now download the file directly from the repository.

On the other hand, if the article is still not published, or if it is under an embargo, we need to forward the request to the corresponding author(s). Sometimes their name(s) and email address(es) will be included within the article itself, and sometimes we have a record of who submitted the article via the Open Access upload form. However, if it is not clear from the article who the corresponding author is, or if their contact details are not included, and if the article was submitted by an administrator rather than one of the authors, we then need to search via the University’s Lookup service for the email addresses of any Cambridge authors, and search the internet for email addresses of any non-Cambridge authors, before we can forward on the request.

As a result, it can take repository staff up to 30 minutes to process an individual request. This is quicker if the article has been requested previously and the author’s contact details are already stored, but can take longer when we need to search. Sometimes, there is also repeat correspondence if the author has any queries, which adds to the total time in processing each request.

Amending our processes

Since introducing ‘Request a copy’, we have started collecting the email addresses of corresponding authors when an article is submitted, and we have commissioned a repository development company to ensure that ‘Request a copy’ emails can be sent directly to those authors for whom we have an email address – a feature that we are hoping to implement in the next few weeks.

However, if the author moves institution, their university email address will no longer be valid, and any requests for their work will again need to come via repository staff. One way to solve this would be to ask for an external (non-university) email address for the corresponding author at the point where they upload the article to the repository. However, this would introduce an extra step to an already onerous process and may act as a further barrier to authors submitting articles in the first place.

Generally, ‘Request a copy’ is a great idea and provides many benefits to the research community and beyond. But the implementation of this service has been challenging. The amount of time taken by each request has meant that some staff members have been redeployed from their usual jobs to facilitate these requests, which also has an impact on the backlog of articles in the repository that need to be checked in case they have since been published. If an article is published but still in the backlog (and therefore not publicly available in the repository), unnecessary requests for it could result in a reputational issue for the Office of Scholarly Communication and the University.

We will continue to look at our processes over the coming academic year, to see how we can improve our current workflows, and identify and resolve any issues, as well as determining where best to focus any further development work. In the related blog post on ‘Request a copy’, I’ll be talking about usage statistics for the service so far, some more unexpected use cases we have encountered, and feedback from our users that will help us to shape the service into the future.

Published 7 October 2016
Written by Sarah Middle
Creative Commons License

Request a copy: uptake and user experience

This post looks at the University of Cambridge repository  ‘Request a copy’ service from the user’s perspective in terms of uptake so far, feedback we have received, and reasons why people might request a copy of a document in our repository. You may be interested in the related blog post on our ‘Request a copy’ service, which discusses the concept behind ‘Request a copy’, the process by which files are requested, and how this has been implemented at Cambridge

Usage Statistics

The Request a Copy button has been much more successful than we anticipated, particularly because there is no actual ‘button’. By the end of September 2016 (four months after the introduction of ‘Request a copy’), we had received 1120 requests (approximately 280 requests per month), the vast majority of which were for articles (68%) and theses (28%). The remaining 4% of requests were for datasets or other types of resource. We are aware that this is a particularly quiet time in the UK academic year, and expect that the number of requests will increase now term has started again.

Of the requests for articles during this period, 38% were fulfilled by the author sending a copy via the repository, and 4% were rejected by clicking the ‘Don’t send a copy’ button. However, these figures could be misleading as a number of authors have also advised us that they have entered into correspondence with the requester to ask them for further information about who they are and why they are interested in this research. Eventually, this correspondence may result in the author emailing a copy of the paper to the requester, but as this happens outside the repository, it does not appear in our fulfilment statistics. Therefore, we suspect the figure for accepted requests is in actual fact slightly higher.

Of the articles requested during this period, 45% were yet to be published, and 55% were published but not yet available to those without a subscription to the journal. The large number of requests made prior to publication indicates the value of having a policy where articles are submitted to the repository on acceptance rather than publication – there is clearly interest in accessing this research among the wider public, and if they are able to make use of it rather than waiting during the sometimes lengthy period between acceptance and publication, this can make the research process more efficient.

Author Survey

To find out why authors might not be fulfilling requests through the repository links, Dr Lauren Cadwallader, one of our Open Access Research Advisors, sent a survey on 6 July 2016 to the 113 authors who had received requests but had not clicked on the repository link or been in touch with repository staff to advise of an alternative course of action. This survey had a 13% response rate, with 15 participants, as well as eight email responses from users who provided feedback but did not complete the survey.

The relatively low response rate is indicative of either a lack of engagement with or awareness of the process – it is possible that the request emails and survey email were dismissed as spam, or that researchers were unable to respond due to an already heavy workload. One way of addressing this could be to include some information about ‘Request a copy’ in our existing training sessions, in particular to emphasise how quick the process can be in cases where the author is happy to approve the request without needing any further information from the user. We have also been developing the wording of the email sent to the author, to explain the purpose of the service more clearly, and to make it sound like a legitimate message that is less likely to be dismissed as spam.

Of the 15 people who participated in the survey, the majority were aware that they had received an email, which shows that lack of response is not always due to emails being lost in spam filters. When asked for the reason why they did not fulfil the request via the repository link, 35% of authors replied that they had emailed the requester directly, either to send the file, to request more information, or to explain why it was not possible for them to share the file at this time. This finding is quite positive, as it indicates that over a third of these requests are indeed being followed up. Although it would be helpful to us to be able to keep track of approvals through the system, at least this means that the service is fulfilling its purpose in providing a way for authors to interact with other interested researchers, and to share their work if appropriate. In fact, one of the aspects that participants liked best about the ‘Request a copy’ service was the ability to communicate directly with the requestor.

Two authors did not respond to the request because the article was available elsewhere on the internet, such as their personal / departmental website, or a preprint server (where the restrictions relating to repositories do not apply), although they did not communicate this to the requestor. In these cases, it is definitely positive that the authors are happy to share their work; however, it does show that there is often an assumption among researchers that people interested in reading their articles will be restricted to those already in their specific disciplinary communities.

Requests from people who are unaware of sites where the research might also be made available demonstrates that there is indeed an appetite among those outside of academia, or from different subject areas. This is generally a really positive thing, as it facilitates the University’s research outputs to educate and inspire a new audience beyond the more traditional communities, and could potentially lead to new collaboration opportunities. To ensure that requestors are able to access the material, and that researchers are not bombarded with requests for documents that are already freely available, authors can provide links to any external websites that are hosting a preprint version of the article, and we will add them to the repository record.

Other responses indicated that we were not necessarily emailing the right person, as participants said that they had not approved the request because they were not the corresponding author, or because they thought a co-author had already responded. At the outset of the service, we felt that emailing as many authors as possible would increase the likelihood of receiving a response; however, the survey results show that it would be better to send requests to the corresponding author(s) only, at least in cases where it is clear who they are.

An issue we have encountered on a semi-regular basis since HEFCE’s Open Access policy came into force is that of making an article’s metadata available prior to its publication. Although HEFCE and funder policies state that an article’s repository record should be discoverable, even if the article itself must be placed under embargo based on publisher restrictions, there is concern among some authors that metadata release breaches the publisher’s press embargo. You can read about this issue in some detail here.

Receiving requests for an article via the ‘Request a copy’ service can be unsettling for authors as it demonstrates how easily the repository record can be accessed, and rather than respond to the request, they contact the Open Access team to ask for the metadata record to be withdrawn until the article is published. This demonstrates a need to communicate more clearly, both on our website and within the ‘Request a copy’ pages in the repository, what is required of authors as part of HEFCE and funder Open Access policies. We will also be more explicit in the ‘Request a copy’ emails sent to authors in stating that sharing their articles via this service will not be seen as a breach of the publisher’s embargo. In cases where the author does not wish to disseminate their article before it is published, they have the option to deny any requests they receive.

Facilitating requests

There have been several instances where press interest around an article at the point of publication has generated a large number of requests, each of which must be responded to individually by the author. This has resulted in several authors asking that we automatically approve every request rather than forwarding them on. Unfortunately this is not possible for us to do, due to the legal issues surrounding ‘Request a copy’.

It is perfectly acceptable for an author to send a copy of their article to an individual, but if a repository makes that article available to everyone who requests it before the embargo has been lifted, this would be a breach of copyright because it would be ‘systematic distribution’. While responding to multiple requests is likely to be seen as an annoyance by an already overstretched researcher, we hope that a large volume of requests will also be viewed in a positive light, as it demonstrates the interest people have in their work.

Use cases

An interesting example of a request we received was actually from one of the authors of the article, as they did not have access to a copy themselves. This raises some questions about communication between the researchers in this case, if the ‘Request a copy’ service was seen to be a better way of gaining access to the author’s own research, rather than contacting one of their co-authors.

A more surprising use case is that of a plaintiff who had lost a legal case. The plaintiff was requesting an as-yet unpublished article that had been written about the case, because the article appears to argue in favour of the plaintiff and could potentially inform a future appeal. This is a good example of how the ‘Request a copy’ service could be of direct benefit in the world outside academia.

Although the vast majority of requests have been for research outputs such as articles, theses and datasets, we also occasionally receive requests for images that belong to collections held in different parts of the University, where high-quality versions are stored in the repository under restricted access conditions. With these requests, it can be more difficult to find who the copyright-holder is, which sometimes requires detective work by the repository team. In one case, permission had to be sought from a photographer who only has a postal address, and therefore required more explanation about the repository more generally, as well as the specific request.

Looking to the future

We will use this research and any further feedback we receive to improve the experience of our ‘Request a copy’ service for both authors and requestors, including implementing the ideas suggested above. Usage statistics will continue to be monitored, and we may run a user survey again to determine how far the service has improved, as well as to identify any new issues.

In the meantime, if you have any comments or questions about our ‘Request a copy’ service, either as an author or a requester (or both), please send us an email to support@repository.cam.ac.uk .

Published 7 October 2016
Written by Sarah Middle
Creative Commons License

Is CC-BY really a problem or are we boxing shadows?

Comments from researchers and colleagues have indicated some disquiet about the Creative Commons (CC-BY) licence in some areas of the academic community. However, in conversation with some legal people and contemporaries at other institutions (some of these exchanges are replicated at the end of the blog) one of the observations was that generally academics are not necessarily cognizant with what the licences offer and indeed what protections are available under regular copyright.

To try and determine whether this was an education and advocacy problem or if there are real issues we had a roundtable discussion on 29 February at Cambridge University attended by about 35 people who were a mixture of academics, administrators, publishers and legal practitioners. The discussion centred on some of the objections raised in the information circulated before the meeting (which is summarised at the end of this blog). For ease of description each objection is addressed in turn.

Background

Creative Commons provide a series of licences that people who create work can add to their work which tell users what they can or cannot do with it. There are a range of licenses that run from no restrictions at all CC-0 to fairly restrictive CC-BY-NC-ND-SA* where the user must attribute the author, not amend the work, cannot make any financial gain from it and must put the same licence on anything they produce using this work.

There are increasing requirements from funders such as the Wellcome Trust and RCUK in the UK that any work published open access must have a Creative Commons Attribution (CC-BY) licence attached to it. The rationale behind this is that research needs to be available for other researchers to both read and reuse, but also to text and data mine without fear of copyright breaches. Work that is available under a CC-BY licence can be easily incorporated into course reading lists without copyright complications.

* Note added 8 March – a comment has been sent through is that the CC-BY-NC-ND-SA is impossible to apply because the share-alike and no derivatives clauses are mutually exclusive and cannot be applied together. See this explanation.

Summary of the discussion

The general feeling in the discussions was that academics do want to share their work but they don’t want things to be used incorrectly. The outcome of the discussion was that while there are some confusions in this area, and we could do some work on advocacy and educational materials there are also some specific cases where CC-BY has the potential to cause issues.  In a small number of cases issues have actually occurred.

Is CC-BY a problem? For whom?

We should note here that CC-BY only affects a proportion of research published in the UK. While all research is potentially affected by the HEFCE requirement to make work available, the route preferred is through placing a copy in a repository. So this discussion affects only those researchers who have a specific grant from the Charities Open Access Fund (Wellcome Trust) or the RCUK. Humanities researchers tend not to hold grants, and for those that do, it is their articles, not their monographs that are affected by this requirement.

While there are some actual concrete examples of issues for researchers in the Arts and Humanities, many of the problems discussed here are what could happen. There was a comment from a scientific publisher that the sciences also had some concerns about CC-BY when it was first introduced, but none of the concerns have actually come to fruition. Another person noted there have been hundreds of thousands of pieces of content published under CC-BY licences, with very few known problem cases or harm. This is telling. The question was raised: Are we just repeating myths?

On the other hand, just because issues haven’t happened yet does not mean that it would not be a serious problem should they did occur. One of the questions at the end of the discussion was: “Are the ethical norms of society strong enough to stop these concerns happening?” It would appear that to date they have been in the sciences.

Moral rights

CC-BY is an attribution licence. This means the moral right for the originator of the work to be identified is retained. However the moral right for the integrity of the research is not protected. The discussion centred around this.

If someone uses work under a CC-BY licence and makes alterations to it, they do need to indicate they have changed a work but not how they have altered it. The concern in the group was that the work could be altered so the meaning is entirely changed and it would still be attributed to the original author.

Authors can object to the derogatory treatment of their work. The recourse of being able to ask to have the originator’s name taken off the work was not seen as satisfactory because then the person who has adapted the work is potentially able to publish the work, which is based substantially on someone else’s work, as their own.

That said, one comment was that academic works are always open to interpretation, whether quoted or not and whether available under a CC-BY licence or not.

Translation

The area of translations does appear to have some concrete examples of problems caused by CC-BY for Humanities & Social Science authors. One of the issues is it is very difficult to check a translation unless the original author can read the language into which their work has been translated.

Plagiarism

Of all of the areas of discussion, plagiarism raised the most opinions. The accusation that CC-BY somehow ‘encourages’ plagiarism is often levelled. Some arguments are that making work available under a Creative Commons licence protect authors against plagiarism rather than encourage it. Works available in the public domain are far more easily identified as the original work than something published on paper and held on a library shelf, for example.

There was a debate about what actually constitutes plagiarism. One opinion was that ‘It’s plagiarism unless it’s in quotes’. However while the use of quote marks would protect the integrity of the work, there is nothing legally wrong with a derivative use of a work that is available under CC-BY – legally this is not plagiarism.

Nothing about the CC-BY licence overrides UK law about fair dealing. One of the lawyers present noted that academics don’t understand the details of copyright. Academics want full protection but also full sharing. In the world of the internet there’s a free-for-all – people copy-and-paste from wherever they want. No-one respects licences, so an academic work is not necessarily protected under current rules.

It was noted that plagiarism occurs all the time, even when articles are all rights reserved and under traditional copyright. And while Open Access publishing does make plagiarism easier (regardless of the licence), it doesn’t change the underlying principle that it’s unethical. Ethical behaviour in academia sits separately from copyright law.

Sensitive information

The area of sensitive information seems to have the strongest case for not using a CC-BY licence. Researchers working in areas that might contain sensitive information – such as medical or criminal areas – spend a great deal of time ensuring that their findings are presented sensitively and ensuring their distribution is appropriate. The concern with CC-BY licences mean that these findings can be misconstrued which would be damaging to the researcher and could go back to the participants and affect them. If presented in the wrong way, altered research outputs could affect not just their research but also participants.

There is an issue about the dialogue between the people that are being studied and if they have any moral rights about how the information is being used.

An example that was given was in anthropology, working with a community of Native Americans in northern California, who released sensitive data and stories from their cultural past which they want to be accessed. However because they have been exploited in the past they wanted some form of restriction on how these things can be reused. This is an example where a CC-BY licence would not be appropriate.

An oral historian discussed the type of work they do with subjects talking about traumatic periods of their life. In these cases the researcher enters in a covenant with them about how their work can be used. This would not be able to be dealt with ethically under a CC-BY licence. The issue is about subsequent control over reuse of research, with concern about it being co-opted and used in another context.

The question about ethical use of material was raised again, with someone noting that no matter what licence it is available under you can’t control what people do with your work if they disagree with you.

Items containing third party copyright

Being required to publish work under a CC-BY licence does cause problems for people whose work contains a large amount of 3rd party material. This is because the burden on the author to obtain permissions for all of the works would be both time consuming and expensive. May researchers have raised questions about whether they can even do their work if they’re required to publish under CC-BY.

That said, if researchers are themselves using CC-BY works this issue is mitigated because they automatically have permission to use the material. This raises the question; does CC-BY make it more difficult or easier?

Commercialisation

There were some examples raised where a series of works that were freely available had been packaged up and sold. This raised the question: Who is being harmed in commercial exploitation of academic works?

Academics do not publish in journals for money, so the originator of a work that is subsequently sold on is not personally losing a revenue stream. There was a distinction between the academic and non-academic publishing environment. It was agreed that the person buying these works are being scammed. The concern is that people are being exploited by being made to pay for things that should be freely available.

The discussion moved to whether a Non Commercial licence would solve this problem. The issue here is the confusion over the definition of ‘commercial’ in this context. An institution that has a revenue stream from student fees could be seen to be commercial and therefore unable to include CC-BY-NC items on their reading lists.

It was noted that CC-BY–NC-ND is extremely restrictive about ways works can be used.

Academic freedom

The discussion several times touched on the broader issue of the government putting an increasing number of requirements against researchers. The questions raised were: “Does someone who is fronting up with the money have the rights to enforce a particular licence? What about the subjects of a study?”

There is supposed to be arms length between funders and universities but a concern is that funding bodies want to have more power to tell academics what to work on.

Next steps

In summary, the discussion indicated that CC-BY licences do not encourage plagiarism, or issues with commercialism within academia (although there is a broader ethical issue). However in some cases CC-BY licences could pose problems for the moral integrity of the work and cause issues with translations. CC-BY licenses do create challenges for works containing sensitive information and for works containing third party copyright.

There is an expectation amongst the academic community that people behave ethically and within cultural norms.

As agreed with the group we have published this blog post which summarises the discussions held this week. In discussions about the Open Access Policy Framework for the University it would be helpful to include a statement that there is concern about CC-BY licences for some disciplines and types of research.

Background information sent to participants prior to the discussion

Commentary on CC-BY in published reports

The issue of the CC-BY licenses was a recurrent theme in A review of the RCUK review of implementation of its OA policy (March 2015). Many arts, humanities and social science disciplines hold ‘principled and practical objections to the use of CC-BY licences’ (p18). This is partly because work under a CC-BY license ‘could be both used commercially in ways of which the author does not approve and also might not be properly acknowledged as their work’ (pp19-20).

The Royal Historical Society evidence to the RCUK review noted that humanities scholars have particular objections to certain kinds of ‘derivative use’ that amount to the encouragement of plagiarism. Because the ‘attribution’ requirement in CC BY is very loose, it is possible for a reuser of a humanities article to alter it and reissue it under their own name, specifying only that it is an adaptation of the original, but without specifying how it has been adapted. In this way reusers may adopt the style, argument and ‘personality’ of the original work under their own name (and even copyright it). This represents a violation of the specific moral right of the author to the integrity of the work, and the only recourse offered to the author by CC BY is to have their name removed from the attribution (which makes the violation worse). This kind of re-use is as likely to degrade as to enhance the public benefit of the research.

The British Academy’s response to the Commons Select Committee (2013) noted that many articles in HSS subjects are the product of single-author scholarship, where there is more of a claim on ‘moral rights’ that are not adequately protected under an unrestricted CC-BY licence. There were also concerns about commercial reuse of work that contains third party copyright, involving complicated permissions. The response suggests that it should be possible to vary Creative Commons licences according to the usages and requirements of different subject areas – and that an ‘Attribution-NonCommercial-NoDerivs’ licence (CC-BY-NC-ND) may very often be more appropriate

Notes on an April 2013 Royal Historic Society position changing workshop on CC-BY and Humanities (chaired by Peter Mandler) noted that the editors of a number of history journals have suggested that the CC-BY licence facilitates and promotes commercial re-use and uses akin to plagiarism; that the licence therefore amounts to an infringement of authors’ moral and intellectual property rights; and that it is likely to damage the quality of education.

The HistoryUK Submission to the 2013 Business, Innovation and Skills Committee Enquiry on Open Access Publishing raised issues about the loss of protection of intellectual property, the dangers associated with allowing derivative works in sensitive areas of research, and the possible increased costs or embargos publishers may feel compensate for the transfer of a commercial asset to a third party.

Comments from researchers and administrators

In preparation for the round table, Danny Kingsley asked her community across the sector what kinds of objections different people in an administrative or library role had heard from researchers. These are summarised below.

English researcher at Cambridge – “I would prefer not to make my work, produced with the benefit of public funding, available in a form that would allow others to exploit it commercially, as the simple CC-BY licence does. My preference would be for the CC BY-NC-SA licence.”

Research Information Specialist – One question to ask here is whether traditional publishing models – such as signing over copyright itself – are really more beneficial to authors, and of course to weigh the risk of a negative CC experience against the benefits of positive ones.

Concerns raised in discussion with academics in the Humanities (reflected in two responses)

  1. A belief that CC BY encourages plagiarism
  2. That content licenced under CC BY is not monitored for copyright and other infringement to the same extent as more restrictive licences (a misguided belief that publishers actively monitor use and reuse of content I think)
  3. I have also heard the more vague concern about ideas being manipulated or twisted in some way and then re-published under the author’s name
  4. That encouraging reuse, especially derivatives, means the author has no control over what people do with the information (and therefore are associated with something that they would rather not be)

Advice provided on Creative Commons and licensing

Published 3 March 2016
Written by Dr Danny Kingsley, with thanks to Dr Philip Boyes and Dr Joyce Heckman for their notes.

Creative Commons License