Amplification for the hearing impaired / 
edited by Michael C. Pollack 
 - 2nd ed. 
 - New York :  Grune & Stratton,  1980 
 - 456 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>0808912127 
<br/><br/><label>LCCN: </label>79-24024 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hearing aids<br/>Audiology<br/>Hearing aids--Instrumentation
<br/><br/><label>National Library of Medicine Call No.: </label>WV274