Fact Detective Stories. Brooklyn, N.Y.: Fact Magazines, Incorporated, March 1939

Fact Detective Stories. Brooklyn, N.Y.: Fact Magazines, Incorporated, March 1939, Volume: Gilbert C175. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/525887 Accessed December 27, 2025.