Biswas, Nripendra Nath. <br/><br/>
Principles of telegraphy /    
N. N. Biswas 
 - London :   Asia Publishing House ,   1964, repr., 1966. 
 - x, 185 p. :    ill. ;    24 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telegraph--------
<br/><br/><label>Dewey Class. No.: </label>621.382 BIS