Correspondence between O'Brien, Lois and Charles with Peter and Virginia Ashlock, 1955, 1964-1965, 1967, 1969-1976, 1983-1984, Box: 4, Folder: 77. Personal papers of Peter D. Ashlock, PP 515. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/395138 Accessed May 11, 2024.