File:Climatic Cycles and Tree-Growth Fig 22.jpg
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:13, 10 August 2012 | 1,200 × 1,023 (132 KB) | Keith Edkins | == {{int:filedesc}} == {{Information |Description={{en|1=Fig. 22.—Sunspot numbers and annual rings in spruce tree from south Sweden. }} |date=1919 |Source=''Climatic Cycles and Tree-Growth'' |Author=Andrew Ellicott Douglass |Permission= |other_versio... |
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