Office of Mental Retardation Coordination (MRC) (This replaces Secretary's Committee on MR.), 1972, Box: 29, Folder: 31. 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/446370 Accessed July 11, 2025.