Non-vocal communication techniques and aids for the severely physically handicapped : based upon transcriptions of the 1975 Trace Center national workshop series on non-vocal communication techniques and aids
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Non-vocal communication techniques and aids for the severely physically handicapped : based upon transcriptions of the 1975 Trace Center national workshop series on non-vocal communication techniques and aids
University Park Press, [1976]
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Note
Bibliography: p. 221-227