CORE Grant, Implementation Grant 1 PO1 HD02528, Program for a Research Center in Mental Retardation, Progress Report, Submitted, April 30, 1968, Box: 14, Folder: 9. 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/452578 Accessed June 26, 2024.