Indian Standard Institution  <br/><br/>
Indian standard specification for body level hearing aids   

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 - New Delhi  Indian Standards Institution  1984 
 - 15 p.   
 -   .
<br/><br/>  
<br/><br/>  Hearing Aids - Specification 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hearing Aids - Specification
<br/><br/><label>Dewey Class. No.: </label>WV200  / IND