File:Climatic Cycles and Tree-Growth Fig 36.jpg
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 18:57, 10 August 2012 | 1,204 × 296 (36 KB) | Keith Edkins | == {{int:filedesc}} == {{Information |Description={{en|1=Fig. 36.—Double sunspot period in tree-growth at inner fjords of Norway; lower curve a 22.8 year cycle.}} |date=1919 |Source=''Climatic Cycles and Tree-Growth'' |Author=Andrew Ellicott Douglass... |
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