House of Commons Parliamentary Papers contains an index for 1801-2000 and the 2004/05-2007/08 sessions; with full text for the entire 18th-20th centuries and the 2004/05 and 2006/07 sessions; to include remaining index and full text content in 2007.
U.S. Congressional Serial Set allow the user to search or browse the reports, documents, and journals of the U.S. Senate and House of Representatives. You can browse by subject, committee, author, publication type, or Congress. The database currently covers the years 1817 to 1976. Eventually, coverage will extend up to 1980.
Many US government documents can be found in Proquest Congressional.
Further help can be found in this general government documents library guide.
19th Century Masterfile indexes nineteenth century periodicals, books, newspapers, and government documents.
PAIS International indexes the social sciences with emphasis on contemporary worldwide social, economic and political issues, and public policy. Covers journals, books, government publications, and directories. Coverage is 1915 to the present.