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The Strength of Shell Bodies : Theory and Practice (1937)
NASA Technical Reports Server (NTRS) · leaf 61
N.A.C.A. Technical Memorandum No. 638 Figs.35,36,37,38 Figure 38.- Failure of full shell with open-hat channels under "bending and twist.NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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