Ruder, Kenneth, Bio-Med Grant: Preschool Language Training Project, November 13, 1980, Box: 69, Folder: 28. 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/455660 Accessed May 13, 2025.