Par Excellence; Fleetwood's Magazine for Collectors. Cheyenne, Wyoming: Unicover Corporation, June/July 1980

Par Excellence; Fleetwood's Magazine for Collectors. Cheyenne, Wyoming: Unicover Corporation, June/July 1980, Volume: Gilbert D756. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/526971 Accessed December 27, 2025.