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Vertical : Helicopters in the Himalayas; Fighting the Thomas Fire in California; The S-70i Black Hawk Helicopter; Brim Aviation and the MD NOTAR aircraft; Intermountain Turbine Services Model Aviation: Skip Robinson, Kenneth
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Howard's Whirlybirds: Howard Hughes's Amazing Pioneering Helicopter Exploits: Porter, Donald J: 9781781550892: Amazon.com: Books