The Congressional Research Service (CRS) is the public policy research arm of the US Congress. It issues briefs, reports, short issue papers, and longer position papers.
Major Studies and Issue Briefs of the Congressional Research Service 1916+ (title varies) are available in microfilm in ALEXANDER DOCMFILM Cabinet 11-1C+ in Government Publications under accession numbers 6006 and 6007. Titles are fully cataloged and appear in QuickSearch. Print guides are available in ALEXANDER DOCREF JK1108.G86 1916/89 and DOCREF JK 1108.G85 for the supplements.
While there is not currently one comprehensive online source for all Congressional Research Service Reports, the sites listed here include substantial collections or otherwise provide access to reports.