Len Filson, Will Everheart, Dick Stagner, and Tom Gissell, approximately 1885, Box: 1, Folder: 6. Gladys Filson Carlson photographs, RH PH 36. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/4073 Accessed February 17, 2025.