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Truls S. Ringnes

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1917

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The eighty year period in short-lived sunspots

by Truls S. Ringnes First published in 1981 — 1 edition

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On the secular variation in the latitude distribution of sunspots

by Truls S. Ringnes First published in 1968 — 1 edition

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On the structure of small sunspots

by Truls S. Ringnes First published in 1984 — 1 edition

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Frequency distribution of sunspot types according to the Waldmeier classification

by Truls S. Ringnes First published in 1986 — 1 edition

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OLID: OL2149984A

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