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Breguet military airplane, type 33 : a two-place long-distance sesquiplane for observation and bombing (1931)
NASA Technical Reports Server (NTRS) · leaf 19
N.A.C.A. Aircraft Circular No.151 Figs.6,7,8NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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