Parent Involvement with Special Education: Respecting Individual Preferences, MacMillan and A. Turnbull in Education and Training of the Mentally Retarded, February 1983, Box: 1, Folder: 72. Personal papers of Rud Turnbull, PP 511. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/304825 Accessed June 16, 2025.