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The Mono-Spar light airplane (British) : a twin-engined low-wing cabin monoplane (1931)

NASA Technical Reports Server (NTRS) · leaf 9

An illustration from The Mono-Spar light airplane (British) : a twin-engined low-wing cabin monoplane, 1931, leaf 9

NASA Technical Reports Server (NTRS)

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

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