Caterpillar catalogs and misc. papers [includes photos], 1959, 1961-64, 1978, 1984 & 1986 87, Box: 8, Folder: 12. Martin Tractor Company records, RH MS 864. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/153950 Accessed May 21, 2024.