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Landing and Braking of Airplanes (1929)
NASA Technical Reports Server (NTRS) · leaf 30
N.A.C.A. TDOhnical Memorandum No.507 Figs.1,3,3 & 4 Fig. 3NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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