The Past and Future Impact of Court Decisions in Special Education, H.R. Turnbull in Phi Delta Kappan, April 1978, Box: 14, Folder: 23. Personal papers of Rud Turnbull, PP 511. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/305310 Accessed June 16, 2025.