Biswas, N.N. <br/><br/>
Principles of Telegraphy 

 - Bombay  Media  1992 
 - p.181 
<br/><br/><label>ISBN: </label>8185099049 
<br/><br/><label>Subjects--Topical Terms: </label> Telegraph Circuits   Teleprinter and TELEX  Telegraph Codes 
<br/><br/><label>Dewey Class. No.: </label>621.382 B621