The Catalog of U.S. Government Publications indexes electronic and print publications from the legislative, executive, and judicial branches of the U.S. government. Direct links are provided to those publications that are available online.
The U.S. Census Bureau interface for distributing the Decennial Census of Population and Housing, the Economic Census, the American Community Survey, annual economic surveys, and other upcoming major related statistical files. This site is the primary source for the Census and the current economic census reports. The site is updated regularly with new data as it becomes available to the public.
The NCJRS Virtual Library has citations and abstracts to federal, state, and local government documents, books, research reports, journal articles, and unpublished research in the field of criminal justice. Some publications are available in full text.
The Legal Requirements & Program Regulations of the Federal Depository Library Program
Keeping America informed : the U.S. Government Printing Office : 150 years of service to the nation.List of Classes by 
The complete guide to citing government information resources