Correspondence between Herring, Jon L. and Peter Ashlock, 1959-1960, 1962-1963, 1965-1966, 1969-1969, 1971, 1975, 1977, Box: 4, Folder: 18. Personal papers of Peter D. Ashlock, PP 515. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/395079 Accessed April 28, 2024.