Vickie Keyes, Jenifer Davis, John Ashwill, Greg Haas, Heather Swisher, Bob Johnson, Aron Hazerd, Dave McCarthy, Neal Harper, Mark Underhill, Eric North, Dennis Rannebeck, John Moenius, Bruce Engler, Kim Calvin, Box: 2, Folder: 51. Martin Tractor Company records, RH MS 864. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/154282 Accessed June 15, 2025.