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

 - Bombay  Media Promoters and Pub Ltd  1964 
 - VII+138 PP 
<br/><br/><label>ISBN: </label>81-85099-04-9 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telegraphy