Grey literature can be harder to identify and find because it often isn't formally published or indexed in the databases used to find scholarly literature.
Some specialized databases may include records for some grey literature, such as government reports, dissertations, or conference papers.
Other strategies to help identify grey literature include:
- check lists of references in books or articles
- identify likely producers of grey literature (think tanks, government agencies, NGOs, etc.)
- Look for Resources, Publications, Reports, Data or similar categories on agency or organization websites
- identify experts in the topic and check their CVs for their publications, reports, conference talks, etc.
- search online - for example, limit Google searches to organization sites by including 'site:.org' (no quotes) in the search
