Sack, S., Educational and Assistive Technology, KU# 19480, Correspondence, June 2, 1999, Box: 70, Folder: 5. University of Kansas Schiefelbusch Institute for Life Span Studies records, RG 35. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/455674 Accessed May 12, 2025.