Chopra, B. N. <br/><br/>
Telegraph & wireless companion :  a comprehensive guide for telegraph trainees signallers, assistant stationmasters ,  ETC / 
B. N. Chopra 
 - Delhi :  Asia Book Centre,  1961 
 - 152 p. ;  18 cm. 
<br/><br/><label>ISBN: </label> Rs. 5.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telegraph, wireless
<br/><br/><label>Dewey Class. No.: </label>384.1076