NOTES
- Porter PB, Carter S. Goolsby E ci at.: Prerequisites to the Use of Augmentative Communication Sivstems Chapel Hill, NC, Clinical Center for the Study of Development and Learning, University of North Carolina at Chapel Hill, 1984.
- Vanderheiden G: Panel Discussion at the American Speech and Hearing Association, Toronto, November 1983.
- Bruner IS: The ontogenesis of speech acts. Child Lang 2: 1–19, 1975.