1. Augmentative and alternative communication: management of severe communication disorders in children and adults;Beukelman,1998
2. Assistive technologies: principles and practice;Cook,2002
3. Augmentative and alternative communication: management of severe communication disorders in children and adults;Grove;J Intellect. Disabil Res,1994
4. Quality of life impact of assistive technology;Jutai;Rehabil Eng,1999
5. Public Law 100-407. Technology Related Assistance for Individuals with Disabilities Act of 1988;Federal Register,1991