Program Project, Communication Research with Retarded Children, Joseph Spradlin, 4354-12, HD-00870-12, $415,602.00, October 1, 1974-September 30, 1975, Box: 60, Folder: 8. 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/455378 Accessed May 17, 2025.