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michael a johnson marion a hersh
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Assistive technology for visually impaired and blind people
Michael A. Johnson, Marion Hersh · Springer London, Limited
725 sayfa · 2008
Blind, Apparatus for the -- Technological innovations / People with visual disabilities -- Orientation and mobility -- Technological innovations / People with visual disabilities -- Means of communication -- Technological innovations / Communication devices for people with disabilities -- Technological innovations / People with visual disabilities
Assistive Technology for the Hearing-Impaired, Deaf and Deafblind
Marion A. Hersh, C. Andersson, Michael A. Johnson, Campbell, D., A Farquharson · Springer London, Limited
319 sayfa · 2006
Deaf, means of communication / People with disabilities, means of communication