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The pressure distribution over a modified elliptical wing tip on a biplane in flight (1931)
NASA Technical Reports Server (NTRS) · leaf 16
U.A.C.JL. Technical Koto 5Fo. 387 Pigs. 2a,2bNASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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