HERSH, Marion A. <br/><br/>
Assistive Technology for Visually Impared and Blind People / 
Marion A. Hersh and Michael A. Johnson 
 - London ,   Springer Verlag London Limited ,  c2008 
 - xxvii, 725p . :  ill . ; 
<br/><br/> Include References and Index 
<br/><br/><label>ISBN: </label>9781846288661 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Assistive Technology
<br/><br/><label>Dewey Class. No.: </label>362.41 HER