Psychology Digest. New York: Hygienic Publishing Co., Inc., June 1936

Psychology Digest. New York: Hygienic Publishing Co., Inc., June 1936, Volume: Gilbert B222. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/527163 Accessed December 27, 2025.