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

 -   Radient books, Bangalore  2001 
 - 138 
<br/><br/><label>ISBN: </label>428 
<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