Newsletters, catalogs, magazines, etc.; newspaper clippings, 1966, 1969-70, 1973-78 & 1987-88, Box: 12, Folder: 11. Martin Tractor Company records, RH MS 864. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/154037 Accessed June 01, 2024.