Richard Johnson (1996), Rodney, Dale Lalman (1993), Marvin Geisler three copies, Linda Vaughn, Chuck Black, Jason Jackson (1993), Mary Kay Bowman, Ellen Dillard (1993), Greg Crisp (1994), Mike Schlengmann, Michael Moeder, Stan Soldberg (2000), Jared Bloom (2000), John Balch (1997), Casey Fraser (1997), Clayton Erickson

Richard Johnson (1996), Rodney, Dale Lalman (1993), Marvin Geisler three copies, Linda Vaughn, Chuck Black, Jason Jackson (1993), Mary Kay Bowman, Ellen Dillard (1993), Greg Crisp (1994), Mike Schlengmann, Michael Moeder, Stan Soldberg (2000), Jared Bloom (2000), John Balch (1997), Casey Fraser (1997), Clayton Erickson, Box: 2, Folder: 4. Martin Tractor Company records, RH MS 864. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/154235 Accessed December 24, 2025.