The Postmark and Cover Collector. Gatesville, Texas: The Economy Press, August 1935

The Postmark and Cover Collector. Gatesville, Texas: The Economy Press, August 1935, Volume: Gilbert C393. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/527126 Accessed December 27, 2025.