International Detective Cases. Chicago, Ill.: Artvision Publishing Company, Inc., April 1936

International Detective Cases. Chicago, Ill.: Artvision Publishing Company, Inc., April 1936, Volume: Gilbert B135. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/526299 Accessed December 26, 2025.