Dowling, John,  <br/><br/>
RAF helicopters :   the first twenty years 

 - xv, 489 pages :   illustrations ;   25 cm 
<br/><br/> Includes indexes 
<br/><br/><label>ISBN: </label>0117727253 ; 9780117727250 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Helicopters ; Military helicopters. ; Royal air force. ; Great Britain.
<br/><br/><label>Dewey Class. No.: </label>623.746047