Zane Walstrom, Kelley McKinney (1995), Randy Cripe two copies, Neil Krone two copies, Duane Bean, Thomas Johnson two copies, Dale Sterrett two copies, David Thielenhaus, Mark Harwood four copies, Martin Keil two copies, Eugene Thielenhaus, Okie Donley (2001), Rob Gordon 2001, Kelly Kyser 2001, Bryen Schultze 2001, Jeremy Sund 2001, Box: 2, Folder: 30. Martin Tractor Company records, RH MS 864. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/154261 Accessed January 03, 2025.