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Are you Henry Wilson Spangler, author of the books below?
Elements of Steam Engineering by Henry Wilson Spangler Notes on Thermodynamics, Vol. 1 by Henry Wilson Spangler Graphics by Henry Wilson Spangler Valve-gears by Henry Wilson Spangler Notes On Thermodynamics by Henry Wilson Spangler Notes On Thermodynamics, Part 1 by Henry Wilson Spangler Valve-Gears by Henry Wilson Spangler Elements of Steam Engineering by Henry Wilson Spangler Notes on Thermodynamics 1908 [Leather Bound] by Henry Wilson Spangler Valve-gears by Henry Wilson Spangler


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