- Canadian Public Policy Collection Collection of publications from Canadian public policy institutes, government agencies, advocacy groups, think-tanks, university research centres and other public interest groups.
- Canadian Health Research Collection of current monograph publications from Canadian research institutes, government agencies and university centres working in the area of health and medical research.
- NBER (National Bureau of Economics Research) Working Papers
- PolicyFile (U.S. Policy) Provides access to U.S. foreign and domestic policy papers and grey literature.
- Hillwatch has an excellent listing of Canadian and international think tanks.
- Global Go To Think Tank Index - University of Pennsylvania
- Search for Think Tanks using Harvard University Library's custom Google search.