Finances (notes, paperwork, etc.), 1968-69, 1973-74, 1976, 1979, 1981, 1983 & 1986-89, Box: 12, Folder: 9. Martin Tractor Company records, RH MS 864. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/154035 Accessed January 18, 2025.