Hollis, John H., Use of Non-Speech Responses to Teach Communication, HD 07339, KU# 4241, Correspondence, 1974 - 1979, Box: 43, Folder: 20. 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/454081 Accessed June 26, 2024.