Core Grant, MRRC, KU # 4060, Miscellaneous, Meeting of Mental Retardation Center Directors, Seattle, Washington, August 28-29, 1968, Box: 18B, Folder: 25. 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/452743 Accessed July 17, 2025.