Milham, Willis I. (Willis Isbister), b. 1874. Early American observatories : Which was the first astronomical observatory in America? / by Willis I. Milham.

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Milham, Willis I. (Willis Isbister), b. 1874.

Early American observatories : Which was the first astronomical observatory in America? / by Willis I. Milham.

Astronomical observatories.

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