Biswas, Nipendra N. <br/><br/>
Principle of telegraphy 

 - Bombay :  Media Promotors &Pub,  2007 
 - 185. 
<br/><br/><label>ISBN: </label>8185099049 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Applied physics
<br/><br/><label>Dewey Class. No.: </label>621.383  / BIS