The Children's Playtime. Cleveland, Ohio: Great Lakes Publishing Company, Inc., June 1930

The Children's Playtime. Cleveland, Ohio: Great Lakes Publishing Company, Inc., June 1930, Volume: Gilbert C99. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/525484 Accessed December 26, 2025.