Grey Literature is a valuable supplement to peer reviewed literature in addictions. Authored by researchers and practitioners in all levels of government, universities, corporations, research organizations, NGOs, and professional organizations, grey literature includes: country profiles, data & statistics, clinical trial registries, policy documents, in-depth reports, white papers, more.
A good supplement to IGO/ NGO searches for content from institutions affiliated with universities, governments, advocacy groups, foundations, non-governmental organizations, and businesses that generate public policy research and analysis.The list represents a mixture of partisan and non-partisan think tanks.