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1
Determination of the solar parallax from photographs of Eros made with the Crossley reflector of the Lick observatory, University of California /
Published 1910“…Carnegie Institution of Washington publication ;…”
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2
An investigation of the rotation period of the sun by spectroscopic methods /
Published 1911“…Carnegie Institution of Washington publication ;…”
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3
The rotation period of the sun as determined from the motions of the calcium flocculi /
Published 1908“…Carnegie Institution of Washington publication ;…”
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Book