This users guide provides instruction for researchers using government documents in this depository collection. Generally applicable to any government document collection, the guide uses a worksheet format to acquaint the user with the SuDocs classification system, the Monthly Catalog of U.S. Government Publications, the publications reference file, the American Statistics Index, CIS/Index, the Index of U.S. Government Periodicals, congressional publications, publications of the presidency, department and agency publications, and the census. (RAA)