Menninger Foundation, 1963-1964, 1966, 1983, 1987, 1992, 1996, Box: 1, Folder: 12. Papers of Doctor Robert C. Harder, RH MS 607. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/277544 Accessed November 23, 2024.