Cars – Cabooses: Frisco caboose 228 – Minneapolis St. Paul & Sault Ste Marie (SOO) caboose 13, Box: 21, Box: 61. Howard Killam Collection, RH MS 1381. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/226926 Accessed May 19, 2024.