Old parts, requisition slips, stationary, notepads, maintenance guides, legal forms, 1923-1930 & 1952-61, Box: 8, Folder: 5. Martin Tractor Company records, RH MS 864. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/153943 Accessed June 25, 2025.