Ballantyne, Deborah <br/><br/>
Handbook of audiological techniques / 
by Deborah Ballantyne 
 - London :  Butterworth-Heinemann,  1990 
 - 237 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>0750610263 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Audiology--methods<br/>Auditory perception<br/>Hearing aids