World's Fastest Four-Engine Piston-Powered Aircraft - Republic's XR-12 Rainbow & the Hughes XF-11
Engels | softcover | 144 blz | 2011
Howard's Whirlybirds : Howard Hughes' Amazing Pioneering Helicopter Exploits
Engels | hardcover | 240 blz | 2013
AH-64 Apache Units of Operations Enduring Freedom and Iraqi Freedom
Engels | softcover | 96 blz | 2005