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The lift distribution of wings with end plates (1938)
NASA Technical Reports Server (NTRS) · leaf 20
N.A.C.A. Technical Memorandum No. 856 Figs. 12,13,14,15 … Figure 15.- Theory compared with Schrenk's measurements. '1NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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