Christopherson, Ed, #5854-705, Long Term Evaluation, April 1, 1979-October 30, 1979, Box: 12, Folder: 18. 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/452528 Accessed July 18, 2025.