Biswas,Nripendra N. <br/><br/>
Principles of telegraphy 

 - Bombay  Asia publishing house  1964 
 - x,185 p.  
<br/><br/> Includes Appendix and Index 
<br/><br/><label>ISBN: </label>0-210-98177-6 
<br/><br/><label>Dewey Class. No.: </label>TBB D66,47 K4;15