Nonspeech Language and Communication, Analysis and Intervention: Language Intervention Series Volume 4 edited by Schiefelbusch, 1980, Box: 10, item: 12-13. Personal Papers of Richard Schiefelbusch, PP 458. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/266521 Accessed November 27, 2024.