Program Project, Communication Research with Retarded Children, Joseph Spradlin, 4354-16, HD-00870-16, $545, 232,00, December 1, 1978-November 30, 1979, Box: 60, Folder: 13. 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/455383 Accessed May 18, 2025.