Terry Cox, Jean Couch, Travis Crowell, Kay Craig, Rob Cunningham (1994), Phillip Beurskens, Spencer Gilmore, Cynthia Murphy, Box: 2, Folder: 59. Martin Tractor Company records, RH MS 864. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/154290 Accessed June 13, 2025.