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The Mureaux 111 R.2 military airplane (French) : a long-distance all-metal observation monoplane (1931)
NASA Technical Reports Server (NTRS) · leaf 8
N.A.C.A. Aircraft Circular No.142 Figs.3,9,10,11,13,13., 14NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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