![Solar phenomena / Sunspot / Wolf number / Nature / Science Solar phenomena / Sunspot / Wolf number / Nature / Science](https://www.pdfsearch.io/img/650557542bd3ce80f910030d9545345c.jpg) Date: 2016-04-11 08:25:05Solar phenomena Sunspot Wolf number Nature Science | | Comparison of New & Old Sunspot Number Time Series E.W. Cliver National Solar Observatory Boulder, CO USAAdd to Reading ListSource URL: www.spaceclimate.fiDownload Document from Source Website File Size: 828,59 KBShare Document on Facebook
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