Admiralty of handbook of wireless telegraphy  vol.II, wirless telegraphy theory 
His Majesty's Stationery Office(HMSO)                        
 - London  Her Majesty's Stationary Office  1938 
 - [various pagings.] 
<br/><br/> Donated by Mrs. Bappu 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Wireless Telegraphy.
<br/><br/><label>Universal Decimal Class. No.: </label>621.394(035)  / HMSO