Core Grant, MRRC, KU# 4060, MRU Research Committee Meetings, Mental Retardation Research and Training Committee,, 1968, Box: 18A, Folder: 49. 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/452691 Accessed July 13, 2025.