Solar Physics · 2010 · 24 citations · 11 references
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11
Group Sunspot Numbers: A New Solar Activity Reconstruction
Douglas V. Hoyt, Kenneth H. Schatten · Solar Physics · 1998 · 474 citations
The solar sunspot cycle in the Maunder minimum AD 1645 to AD 1715
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The Butterfly Diagram in the Eighteenth Century
R. Arlt · Solar Physics · 2009 · 97 citations · Full text