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Langley memoir on mechanical flight : pt. 1- (1911)
Langley, S. P. (Samuel Pierpont), 1834-1906, Manly, Charles M. (Charles Matthews), 1876-1927 · Washington, D.C. : Smithsonian Institution · leaf 475
VOL. 27, NO. 3, PL. 92 SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGE … QUARTER-SIZE MODEL AERODROME IN FLIGHT, AUGUST 8, 1903Aeronautics · Flight
Internet Archive · Boston College Libraries · Public domain (published before 1931). Free to use for anything.
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