CORE Grant, Program for a Research Center in Mental Retardation, R. L. Schiefelbusch, 4060-21, February 14, 1986, Box: 16, Folder: 7. 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/452611 Accessed March 12, 2025.