Matrix of Federal Statutes and Federal and State Court Decisions Reflecting the Core Concepts of Disability Policy, H.R. Turnbull, Stowe, Klein, 2008, Box: 2, Folder: 29. Personal papers of Rud Turnbull, PP 511. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/304915 Accessed June 12, 2025.