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

NASA Technical Reports Server (NTRS) · leaf 9

An illustration from Boulton Paul p.71A commercial airplane (British) : a two-engine biplane, 1935, leaf 9
Fig. N.A.C.A. Airoraft Circular No* 199 yieure 8.

NASA Technical Reports Server (NTRS)

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