Mainstreaming: An Alternative for Preschool Handicapped Children, A. Turnbull in Southern Association on Children under Six, Volume 4, Number 3, March 1976, Box: 1, Folder: 124. Personal papers of Rud Turnbull, PP 511. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/304877 Accessed June 17, 2025.