Implementing augmentative and alternative communication strategies for learners with severe disabilities by Joe Reichle, Jennifer York, and Jeff Sigafoos, with invited contributors. Reichle, Joe, 1951 3260 Communication devices for people with disabilities. People with mental disabilities--Means of communication. 3261 RC429 .I46 1991 Baltimore P.H. Brookes Pub. Co. c1991. c1991. Text xi, 302 p. eng