C&NW (Chicago & Northwestern) diesels 4452 - unknowns, steams, cars, cabooses; Dallas cars - DM&IR (Duluth Missabe & Iron Range), Box: 7, Box: 29. Howard Killam Collection, RH MS 1381. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/226765 Accessed May 19, 2024.