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Clark, Alva: A new system of astronomy, in question and answer : For the use of schools and academies (G.R. Lockwood, 1820) (page images at HathiTrust) Clark, Alva: A new system of astronomy, in question and answer. For the use of schools and academies. (R. Lockwood & Son, 1867) (page images at HathiTrust)See also what's at your library, or elsewhere.
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