The Model Builder. Mount Morris, Illinois: The Lionel Corporation, January/February 1937

The Model Builder. Mount Morris, Illinois: The Lionel Corporation, January/February 1937, Volume: Gilbert D640. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/526704 Accessed December 27, 2025.