Royal Signals <br/><br/>
Handbook of Line Communication 
Royal Signals 
 - W.O. code No 1698 
 - London  Her Majesty's Stationery  1962 
 - 703-773p. 
<br/><br/><br/>Almirah No.132 and Shelf No.1 
<br/><br/><label>Dewey Class. No.: </label>621.38