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A general tank test of a model of the hull of the Pem-1 flying boat including a special working chart for the determination of hull performance (1938)
NASA Technical Reports Server (NTRS) · leaf 14
I.X.Q.k. lachnloaJ Ho to io. 681 Tig. SNASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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