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New paper! Equivalence Relations Between the Cortie and Zürich Sunspot Group Morphological Classifications http://t.co/Z5xacvJuZA
New paper! Equivalence Relations Between the Cortie and Zürich Sunspot Group Morphological Classifications http://t.co/Z5xacvJuZA
New paper! Equivalence Relations Between the Cortie and Zürich Sunspot Group Morphological Classifications http://t.co/Z5xacvJuZA
Equivalence relations between the Cortie and Zurich sunspot group morphological classifications. http://t.co/YdXXRq11KL