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Boulton Paul p.71A commercial airplane (British) : a two-engine biplane (1935)

NASA Technical Reports Server (NTRS) · leaf 8

An illustration from Boulton Paul p.71A commercial airplane (British) : a two-engine biplane, 1935, leaf 8
N.A.C.A. Aircraft Circular No. 199 Flge. 6,7

NASA Technical Reports Server (NTRS)

Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.

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