Biswas, Nripendra N <br/><br/>
Principles of telephony 

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 - Radiant Books, Banglore  1988 
 - 138 
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<br/><br/>  
<br/><br/><label>ISBN: </label> 20 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Wire telephony; Electronics and communication engineering; Applied physics
<br/><br/><label>Dewey Class. No.: </label>621.385  BIS-P