Early Intervention-A Team Approach edited by K. Eileen Allen, Vanja A. Holm and Schiefelbusch, 1978, Box: 10, item: 6. Personal Papers of Richard Schiefelbusch, PP 458. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/266517 Accessed November 27, 2024.