The online catalog includes the majority of the materials from both government documents collections: the United States and the European Union.
The GPO Catalog of Government Publications indexes government publications from the U.S. Superintendent of Documents, the publisher of materials from all federal agencies.
Many of the most recent publications from federal agencies are available on the agency website or via a comprehensive government site, USA.gov. While this site is broken down by topic rather than agency,it has numerous links of interest to historical researchers. Select the option to search by topic and scan the subdivisions to find your area(s) of interest.