C&NW (Chicago & Northwestern) stations Oak Creek, Wis. - Yanktown, SD, diesels BU-40 – 4439, Box: 7, Box: 28. Howard Killam Collection, RH MS 1381. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/226764 Accessed May 19, 2024.