Grey literature refers to material produced in non-traditional ways, outside the control of commercial publishers. Grey literature can be created at all levels of government, academia, and industry, in print or electronic formats (Schopfel, 2010). Types of grey literature include, but are not limited to, theses, conference proceedings, government and industry reports, and blogs (New York Academy of Medicine, n.d.). A more comprehensive list of types and formats can be found at the GreyNet International website, linked below.
New York Academy of Medicine. (n.d.). What is grey literature? http://www.greylit.org/about
Schopfel, J. (2010, December). Towards a Prague definition of grey literature. Twelfth International Conference on Grey Literature. https://opengrey.eu/item/display/10068/700015-2/
It is important to assess the merits of the grey literature that you find. High quality grey literature will have a credible author, accurate and objective content, current information and good breadth or depth of coverage that is relevant to the topic. You may find the AACODS Checklist from Flinders University a useful guide:
If you aren't sure where to start, here are some general sources that provide a variety of types of grey literature.
This guide is designed to help you: