Sure-Fire Comics. Springfield, Mass.: Ace Magazines, Inc., June 1940

Sure-Fire Comics. Springfield, Mass.: Ace Magazines, Inc., June 1940, Volume: Gilbert D1021. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/527663 Accessed December 27, 2025.