The Conference Board Management Record. New York: National Industrial Conference Board, Inc., January 1939

The Conference Board Management Record. New York: National Industrial Conference Board, Inc., January 1939, Volume: Gilbert D613. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/525555 Accessed December 27, 2025.