CIS U.S. Serial Set Index, 1789-1969. Washington, D.C.: Congressional Information Service, Inc., 1975-79.
The CIS U.S. Serial Set Index includes an Index of Subjects and Keywords as well as an Index of Names and Organizations. There is also a numerical list of reports and documents and a schedule of serial volumes to assist in locating a copy of a document in the serial set once the congressional reference number is known. Each reference in the subject index gives the document number, the congress and session, and the volume in the Serial Set where the document can be found. This index gives the most consistently comprehensive information of any of the indexes about where to locate a document in the Serial Set and is an excellent starting point for historical searching.