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    HardPress

    Double-star Astronomy: Containing the History of Double-star Work; Computation of Orbits and Position of Orbit-planes; Formulae in Connection With Mass, Parallax, Magnitude, Etc

    Double-star Astronomy: Containing the History of Double-star Work; Computation of Orbits and Position of Orbit-planes; Formulae in Connection With Mass, Parallax, Magnitude, Etc

    $12.95 USD
    $12.95 USD
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    Thomas Lewis

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