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The internal work of the wind (1893)
Langley, S. P. (Samuel Pierpont), 1834-1906 · Washington, Smithsonian institution · leaf 1
^ mn u 1903 /^,2,}0irST> Xb/7./0JWinds · Aeronautics
Internet Archive · Cornell University Library · Public domain (published before 1931). Free to use for anything.
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