"Annals of the Oley Valley in Berks County, Pennsylvania" by P.C. Croll - Reading, Pennsylvania: Reading Eagle Press, 1926, Box: 27, Volume: 85. Personal papers of Joseph M. Kellogg, PP 237. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/136906 Accessed May 20, 2024.