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The top documents tagged [variation of solar activity]
1 The Forgotten Sun Leif Svalgaard Stanford University SHINE-2011, Snowmass, CO 13 July 2011
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1 History and Calibration of Sunspot Numbers Edward W. Cliver, AFRL Leif Svalgaard, Stanford Univ. Kenneth H. Schatten, a.i. Solutions IUGG XXV General
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The Forgotten Sun
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