tec; The Five-In-One Detective Magazine. Albany, N.Y.: Quintec, Inc., May 1939

tec; The Five-In-One Detective Magazine. Albany, N.Y.: Quintec, Inc., May 1939, Volume: Gilbert D1027. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/527693 Accessed June 11, 2026.