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Keywords: HSLeavittHSCr13Fig2 1912.jpg en Figure 2 Periods of 25 Variable Stars in the Small Magellanic Cloud Harvard College Observatory Circular vol 173 2014-08-14 15 46 41 Periods of 25 Variable Stars in the Small Magellanic Cloud Harvard College Observatory Circular vol 173 Leavitt Henrietta S; Pickering Edward C PD-old-70-1923 Uploaded with UploadWizard History of astronomy Harvard College Observatory |