In Memory of Jay Turnbull: 1968-2009, H.R. Turnbull in Exceptional Parent, Volume 39, Issues 5, May 2009, Box: 2, Folder: 9. Personal papers of Rud Turnbull, PP 511. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/304895 Accessed June 16, 2025.