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

 - Bangalore  Radiant Books , Bangalore.  1994 
<br/><br/><label>ISBN: </label>0000024137 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Telephony<br/>Principles <br/>Telephony(621.385)
<br/><br/><label>Dewey Class. No.: </label>621.385