North American Aircraft
O'LEARY, Michael & SCHULZINGER, Eric
Black Magic - America's Spyplanes: SR-71 and U-2
PACE, Steve
B-2 Spirit - The Most Capable War Machine on the Planet
Walter J. Boyne Military Aircraft Series 4
PAPE, Garry R. & CAMPBELL, John M.
Northrop Flying Wings
A History of Jack Northrop's Visionary Aircraft