REFERENCES
- Quist, R. W. & Blischak, D. M. (1992). Assistive communication devices: Call for specifications, Augmentative and Alternative Communication, 8, 312–317.
- McNaughton, S. (1993). Adding graphic capabilities to device specifications: Comments on Quist and Blischak (1992). Aug-mentative and Alternative Communication, 9, 286.