FRISCO/St. Louis San Francisco 1st gen diesels 620 – 5313, 2nd gen diesels 101 - 444, Box: 7, Box: 39. Howard Killam Collection, RH MS 1381. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/226775 Accessed May 19, 2024.