Grey literature is informally published written material (such as reports) that may be difficult to trace via conventional channels such as published journals and monographs because it is not published commercially or is not widely accessible. It may nonetheless be an important source of information for researchers, because it tends to be original and recent. Examples of grey literature include patents, technical reports from government agencies or scientific research groups, working papers from research groups or committees, white papers, and preprints. (From Wikipedia, the free encyclopedia)
What does grey literature include?
- Blogs, wikis, blikis
- Census, economic and other data sources
- Clinical guidelines
- Clinical trials
- Conference proceedings and abstracts
- Databases of ongoing research
- Digital libraries
- Electronic networks
- Government Documents
- Informal communication (telephone calls, meetings)
- Listserv archives
- Meta-searching, federated searching, portals
- Policy statements and issues papers
- Pre-prints and post-prints of articles
- Research reports (completed and uncompleted)
- Spatial data (ie. Google Earth)
- Technical reports
- Theses and dissertations
- Web 2.0 communication
Differences between grey and published literature
(From Grey literature / Liz Hunwick, Basildon Healthcare Library)
Sources of grey literature
- GreyNet International
- The NewYork Academy of Medicine
- BioMed Central: The Open Access Publisher
- PMC: PubMed Central - PMC is a free full-text archive of biomedical and life sciences journal literature at the U.S. National Institutes of Health's National Library of Medicine (NIH/NLM).
- DocuTicker - Collects abstracts from 'grey literature': PDF reports published by government agencies, think tanks, NGOs, research institutes and other public interest groups.
- OpenDOAR - Is an authoritative directory of academic open access repositories.
- World Health Organization
- Cogprints - An electronic archive for self-archive papers in any area of Psychology, Neuroscience, and Linguistics, and many areas of Computer Science, Philosophy, Biology.
- University of York: Centre for Reviews and Dissemination (CRD) - National Institute for Health Research