Risley, Todd R., Research on the Development of Children from Depriving Environments, February 19, 1976, Box: 69, Folder: 1. 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/455633 Accessed May 16, 2025.