Jeffrey Whitaker, Eric Umphenour, William Wilson, Jerry Zillinski, Paul Chaponniere (1996), Charles Atchison (1997), John Ashwell, Richard Barton (1999), Jennifer Herron Beard, Jerod Birzer (1997), Ray Bramlage two copies, Niles Brandstoettner, Susan Bisel two copies, Jeremy Blair, Judy Brock (1998), Roger Byler, Jim Broxterman, Roni D. Carlson, Sam J. Brown, Box: 2, Folder: 11. Martin Tractor Company records, RH MS 864. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/154242 Accessed June 24, 2025.