"Shop Talk" Washington, D.C.: The Mission Stamp Mart, February 1937

"Shop Talk" Washington, D.C.: The Mission Stamp Mart, February 1937, Volume: Gilbert C465. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/527445 Accessed December 27, 2025.