world's great military helicopters Modern Air Power Helicopters Helicopter; A Pictorial History Cobra; tank killer surpreme Chopper!; The Illustrated Story of Helicopters in Action Bell UH-1 Super Profile Sea King Super Profile U.S. Marine Corps Helicopters Helicopter; an Illustrated History of Rotary-Winged Aircraft deutsche Luftfahrt; Hubschrauber und Tragschrauber Techniek und Geschichte der Hubschrauber; Von Leonardi da Vinci bis zur Gegenwart Combat Helicopters since 1942
