Grey literature is any literature that has been published by non-traditional means and is often excluded from large databases. Common sources of Grey literature include, government departments, research institutes and conference proceedings; additionally, posts on social media sites (such as Twitter, YouTube, etc.) are another source of Grey literature materials. Because it's excluded from major databases, grey literature can often be hard to find materials.
However, these materials often represent an important part of your research. Incorporating grey literature into your research is important because;
Below are some resources that can help you identify organizations and/or search directly for grey literature.
Searches more than 700 think tanks & research centers that generate public policy research & analysis.
Provides numerous Internet links to data, funding announcements, reports, podcasts, discussion groups, & more.
A list of grey literature producing organizations from the New York Academy of Medicine.
Access to more than 3 million scientific, technical, engineering, and related business information from U.S. gov't
An open-source medical search engine designed to provide evidence for clinical decision-making. Includes research evidence, images, videos, patient information leaflets, educational courses, and news
A tutorial by the University of Toronto libraries on what Grey literature is and how to find it.
The largest collection of Grey/Gray literature
Finding grey literature and searching it can be challenging. But there are a few approaches that you can take to add some structure to your search of this type of information:
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