Richardson, Lewis Fry. Mathematical Psychology of War. Oxford: W. Hunt, 1919

Richardson, Lewis Fry. Mathematical Psychology of War. Oxford: W. Hunt, 1919, Box: 15, Folder: 21. Personal papers of Philip Schrodt, PP 496. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/114210 Accessed December 24, 2025.