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A method of determining the dimensions and horsepower of an airship for any given performance (1924)
NASA Technical Reports Server (NTRS) · leaf 15
Fig.l N.A.G.A. Tichnical Note Ko.l94 … I—30-- Fig.lNASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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