Risley, Todd, Evaluation of Living Environments of Retarded Children, 1 RO1 HD-O5720, Grant Award, 1972, Box: 68, Folder: 19. 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/455613 Accessed June 02, 2024.