Biswas, Nripendra Nath, <br/><br/>
Principals of telegraphy / 
Nripendra Nath Biswas 
 - India:  Media Promoters & Publishers pvt ltd.,  c1964. 
 - x,185p.:  table, figs.;  22 cm. 
<br/><br/> Includes Index. 
<br/><br/>Includes bibliographical reference (Various Chapter) 
<br/><br/>
<br/><br/><br/>english 
<br/><br/><label>ISBN: </label>0862492459 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telegraph<br/>Telegraph--Equipment and supplies
<br/><br/><label>Dewey Class. No.: </label>621.382/BIP