File:Climatic Cycles and Tree-Growth Fig 22.jpg
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Summary
| Description |
English: Fig. 22.—Sunspot numbers and annual rings in spruce tree from south Sweden. |
| Date | |
| Source | Climatic Cycles and Tree-Growth |
| Author | Andrew Ellicott Douglass |
Licensing
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This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 100 years or fewer.  You must also include a United States public domain tag to indicate why this work is in the public domain in the United States.
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| 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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