Photo Technique. New York: McGraw-Hill Publishing Co., Inc., June 1939

Photo Technique. New York: McGraw-Hill Publishing Co., Inc., June 1939, Volume: Gilbert D786. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/527026 Accessed December 27, 2025.