Fact Spy Stories. New York, N.Y.: Fact Magazines, Incorporated, April 1939

Fact Spy Stories. New York, N.Y.: Fact Magazines, Incorporated, April 1939, Volume: Gilbert C176. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/525889 Accessed December 27, 2025.