Walker, R. C.  <br/><br/>
Aircraft Radio :   Dealing with the fundamental principles of radio equipment, with special reference to ots use in aircraft and ground stations 

 - London :   George Newnes Limited,   1943. 
 - p. 124 
 - Aeroplane Maintenan .
<br/><br/><label>Subjects--Topical Terms: </label><br/>ADF<br/>RADIO
<br/><br/><label>Universal Decimal Class. No.: </label>629.735