References
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- GOETZ, L., SCHULER, A. and SAILOR, W. Teaching Functional Speech to the Severely Handicapped: Current Issues. Journal of Autism and Developmental Disorders, 9, 325–343 (1979).
- KIRK, S. and KIRK, W. Uses and abuses of the I.T.P.A. Journal of Speech and Hearing Disorders, 43, 58–75 (1978).