Core Grant, MRRC, KU # 4060, Miscellaneous, Mental Retardation Research Center Directors as of January, 1968, Box: 18B, Folder: 21. 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/452739 Accessed July 20, 2025.