The McGraw-Hill Digest. New York: McGraw-Hill Publishing Company, Inc., May 1946

The McGraw-Hill Digest. New York: McGraw-Hill Publishing Company, Inc., May 1946, Volume: Gilbert B148. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/526580 Accessed December 26, 2025.