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Technical report of the 1928 Rhon soaring-flight contest (1929)
NASA Technical Reports Server (NTRS) · leaf 18
N.A.C.A. Technical Memorandum No.514 Figs.21 & 23 Fig.21 … • Fig.22NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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