Program Project, Communication Research with Retarded Children, Joseph Spradlin, 4354-10, HD-00870-10, $430,694.00, October 1, 1972-September 30, 1973, Box: 60, Folder: 3. 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/455373 Accessed June 02, 2024.