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The Wibault 220 R.N. 3 airplane (French) : a three-place observation high-wing monoplane (1930)
NASA Technical Reports Server (NTRS) · leaf 7
H.A.C.A. Aircraft Circular Ho.124 rigs.*,5,6,7,8,8,10,11,13,13NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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