Assistive devices for persons with hearing impairment 
Edited by Richard S. Tyler and Donald J. Schum 
 - Boston  Allyn and Bacon  1995 
 - 283 p. : ill. ; 24 cm. 
<br/><br/><label>ISBN: </label>0205151264  RM113.91 
<br/><br/><label>LCCN: </label>94-026290 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Communication Aids for disabled<br/>Hearing disorders--Rehabilitation<br/>Hearing aids