Avon Detective Mysteries. New York: Avon Book Company, March 1947

Avon Detective Mysteries. New York: Avon Book Company, March 1947, Volume: Gilbert B20. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/525244 Accessed December 25, 2025.