Selected U.S. Government Publications. Washington, D.C.: Superintendent of Documents, Government Printing Office, 1971

Selected U.S. Government Publications. Washington, D.C.: Superintendent of Documents, Government Printing Office, 1971, Volume: Gilbert C549. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/527416 Accessed December 27, 2025.