Digiovanni, Jeffrey J. <br/><br/>
Hearing aid handbook / 
Jeffery J. DiGiovanni. 
 - Clifton Park, NY :  Delmar Cengage Learning,  2011. 
 - x, 646 p. :  ill. ;  23 cm. 
<br/><br/>References : p. 621-630 
<br/><br/><label>ISBN: </label>9781435481114  RM120.21 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hearing aids
<br/><br/><label>National Library of Medicine Call No.: </label>WV274  / .D571h 2011 9HUKM