Biswas, Nripendra N. <br/><br/>
Principles of Telegraphy 
Nripendra N. Biswas 
 - Bombay  Asia Publishing  1976 
 - x, 185 p.  
<br/><br/> Includes Appendix and Index 
<br/><br/><label>Dewey Class. No.: </label>TBB D66,47   / K4; 3