Doyle Hess (2000), Greg Heine, Joshua Hunninghake (?) 2000, Ann Hudson (1998), Bob Johnson two copies, Bob Jensen two copies, Anthony Dahl two copies, H.W. Craig two copies (1997), Jerad Crotinger (1999), Mike Davis (1994), Bill Martin, Bill Bryce, Bill Geissler, Box: 2, Folder: 36. Martin Tractor Company records, RH MS 864. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/154267 Accessed January 03, 2025.