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

 - Bangalore  1970 
 - (6),138  Pb 
<br/><br/><label>ISBN: </label>81-85273-09-X 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>
<br/><br/><label>Dewey Class. No.: </label>621.385