Michaelis, Eli, Program for a Research Center in Mental Retardation, KU# 4060-24, November 1, 1989, Box: 52, Folder: 21. 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/455127 Accessed November 27, 2024.