Operation: Peril. St. Louis, Mo.: Michel Publications, Inc., October/November 1950

Operation: Peril. St. Louis, Mo.: Michel Publications, Inc., October/November 1950, Volume: Gilbert D742. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/526934 Accessed December 27, 2025.