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The airspeed "Oxford" training airplane (British) : a two-engine cantilever monoplane (1937)
NASA Technical Reports Server (NTRS) · leaf 9
I.A.O.A. Airoraft OirouUr lo. 208 rigs. 3,4NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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