Handbook for radio operators working installations licensed by the Home Office / 
Post Office. 
 - 14th ed. 
 - London :  H.M.S.O.,  1975. 
 - xi, 258p. 
<br/><br/><label>ISBN: </label>0118804626 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Radio in navigation--Handbooks, manuals, etc.