Boylan, John. Sequel to the Apocalypse; The Uncensored Story: How Your Dimes and Quarters Helped Pay for Hitler's War. New York: Booktab, Inc., 1942

Boylan, John. Sequel to the Apocalypse; The Uncensored Story: How Your Dimes and Quarters Helped Pay for Hitler's War. New York: Booktab, Inc., 1942, Volume: Gilbert D972. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/525354 Accessed December 27, 2025.