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Num Mark Subjects (1-5 of 5) Year Entries
16 Found
1 Research aircraft.   9
2 Research aircraft -- Germany -- History : X-planes : German Luftwaffe prototypes 1930-1945 / Manfred Griehl  2012 1
3 Research aircraft -- United States   3
4 Research aircraft -- United States -- History   2
5 Research aircraft -- United States -- History -- 20th century : Beyond blue skies : the rocket plane programs that led to the Space Age / Chris Petty ; foreword by Dennis R. Jenkins  2020 1
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