Hearing aids  a review of past research on linear amplification, amplitude compression, and frequency lowering 
Louis D. Braida ... [et al.]. 
 - Rockville, Md.  American Speech-Language-Hearing Assn.  1979-[c1980] 
 - ix, 115 p.  ill. 
 - ASHA monographs ; no.  19 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hearing aids.
<br/><br/><label>LC Class. No.: </label>RF300  / .M35 1980 
<br/><br/><label>National Library of Medicine Call No.: </label>W1 A152B no.19 1979  [WV 274 H434 1979]