Threshing rigs and steam tractors with crews; unidentified, circa 1900s-1910s, Box: 4, Folder: 80. Voth, Unruh, and Banman families collection, RH MS 1455. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/376419 Accessed April 26, 2025.