The term "grey literature" describes information sources that have been produced outside of the traditional publishing and distribution channels used by academic books and journals. Examples include conference proceedings, theses and dissertations, government reports, census data, white papers, working papers, newsletters, technical reports, and patents. These sources are usually not peer-reviewed but can still be valuable to your research as they often cover current and emerging research and are a good source for raw data, statistics, and policies.
You can find grey literature using MultiSearch.
Type your search terms into the search box and click on the magnifying glass icon to run the search.
Use the Resource Type filter on the results screen to select the grey literature format(s) you are interested in and click on Apply Filters.