File:HSLeavittHSCr13Fig1 1912.jpg

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English: Figure 1, "Periods of 25 Variable Stars in the Small Magellanic Cloud" Harvard College Observatory Circular, vol. 173
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Source "Periods of 25 Variable Stars in the Small Magellanic Cloud" Harvard College Observatory Circular, vol. 173
Author Leavitt, Henrietta S; Pickering, Edward C

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