Grey literature are documents distributed outside of commercial publishing and typically not peer reviewed. Grey literature can be created by think tanks, research institutes, government agencies, non-governmental organizations (NGOs), intergovernmental organizations (IGOs), professional organizations, and more. Examples are:
It can be hard to find grey literature because these works is not just one place to search for them. You can find grey literature:
Use the advanced search techniques for Google outlined below to target your search and find reliable sources. Learn more on how to refine Google searches.
Resources on evaluating think tanks.