Fifty Plus, The Magazine for Successful Retirement. Washington, D.C.: Plus Publications, Inc., March 1961

Fifty Plus, The Magazine for Successful Retirement. Washington, D.C.: Plus Publications, Inc., March 1961, Volume: Gilbert D325. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/525930 Accessed December 28, 2025.