Grey literature is information that is created and distributed outside of academic and commercial publishers. Policy papers, policy briefs, white papers, occasional papers, working papers, studies, and reports are examples of grey literature.
"Columbia International Affairs Online (CIAO) is the world’s largest online resource of documents and articles devoted to research, analysis, and scholarship on international politics and related fields, including security studies, global finance, diplomatic practice, humanitarian law, global governance, development studies, and environmental studies." (From CIAO - About CIAO)
"Find results from 17 leading think tanks working on foreign policy, in the US and Europe"
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"Issue Lab ....collects, preserves, and shares research reports, whitepapers, evaluations, case studies, issue briefs, and more. Our knowledge base is published and/or funded by social sector organizations, and is one way that we connect people who want to change the world with the resources they need to do it. " (from Issue Lab)
"One-stop access to more than 30 million pages of curated, high quality policy reports, briefs, analyses, working papers, and datasets from thousands of policy organizations."
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