U.S. Government Publishing OfficeThe U.S. Government Publishing Office (GPO) is the Federal Government’s resource for official information products for all three branches of the U.S. Government. GPO provides public access to Federal Government information at no charge through theFederal Digital System (FDsys). Search the Catalog of U.S. Government Publications (CGP) for federal government documents. Results for items available online will have links to the resource, while other items may be accessible at a Federal Depository Library or through the GPO bookstore.
US Army Center of Military HistoryThe Center Of Military History (CMH) records the official history of the US Army, including unit histories and oral histories. The Center's publications can be found in electronic format at http://www.history.army.mil/catalog/index.html.