1. Bonvillion, J. D., & Nelson, K. E.Sign language acquisition in a mute autistic boy. Unpublished paper, 1974. (Available from Dr. Douglas O. Brady, Child Study Center, 1300 West Lancaster, Fort Worth, Texas 76102.)
2. Creedon, M. P.Language development in nonverbal autistic children using a simultaneous communication system. Paper presented at the Society for Research in Child Development Meeting, Philadelphia, March 1973.