Bertha Fastenau (Mrs. Sylvester W. Kufahl) and her sisters Olga, Emma, and Cora Fastenau, Box: 1, Folder: 1. Bales family papers, RH MS 952. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/68804 Accessed May 04, 2024.