Unfinished Worlds: a Study in Astronomy By S. H. PARKES New York, Pott. 12‡ $1.50

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  Unfinished Worlds: a Study in Astronomy By S. H. PARKES New York, Pott. 12‡ $1.50

  Science27 Jan 1888 : 45

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  Unfinished Worlds: a Study in Astronomy By S. H. PARKES New York, Pott. 12‡ $1.50

  Science27 Jan 1888 : 45

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