References
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- Beukelman, D. R., Yorkston, K. M., & Dowden, P. A. (1985). Aug-mentative communication: A casebook of clinical management. Boston: College-Hill Press.
- HiIlel, A. D., Miller, R. M., Yorkston, K. M., McDonald, E., Norris, F. H., & Konikow, N. (in press). ALS Severity Scale. Journal of Neuroepidemiology.
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- Yorkston, K. M., Beukelman, D. R., &. Traynor, C. D. (1984). Assess-ment of intelligibility of dysarthric speech. Austin, TX: Pro-Ed.