BISWAS N N <br/><br/>
Principles of Telephony 

 - Bangalore  Radiant Books  1984 
 - 81-85099-04-9 
<br/><br/><label>ISBN: </label>81-85099-04-9 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telephony
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>Telecommunications<br/>telephoney