Block, M <br/><br/>
Overview of the professional fitting system.  [electronic resource] 

 -  Trends in amplification  Dec 1998 
 - 140-51 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1084-7138 
<br/><br/><label>Standard No.: </label>10.1177/108471389800300403  doi