illustrated history of Helicopters 50 einsitzige und unbemannte Hub- und Tragschraube Jane's pocket book 20; Helicopters Source Book of Vertical Take-Off Aircraft Jolly Green Giants; US Combat Helicopters Helicopter, An Illustrated History Helicopters Hubschraubermuseum Bückeburg Gevechtsvliegtuigen voor de KLu; de geschiedenis van de keuzebepaling en de aanschaf Oshkosh; the worlds biggest aviation event Wright Flyers; Picture Card Gallery of Aviation illustrated guide to Spy Planes and Electronic Warfare Aircraft
