Baer, Don, Training new Personnel for Behavior Modification, MH11739-03, July 21, 1971, 1971, Box: 3B, Folder: 4. University of Kansas Schiefelbusch Institute for Life Span Studies records, RG 35. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/452322 Accessed July 11, 2025.