File:Climatic Cycles and Tree-Growth Fig 32.jpg

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English: Fig. 32.—Smoothed curve of Arizona pines showing the half-sunspot period for 120 years.
Date
Source Climatic Cycles and Tree-Growth
Author Andrew Ellicott Douglass

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Date/TimeThumbnailDimensionsUserComment
current17:36, 10 August 2012Thumbnail for version as of 17:36, 10 August 2012823 × 547 (63 KB)Keith Edkins== {{int:filedesc}} == {{Information |Description={{en|1=Fig. 32.—Smoothed curve of Arizona pines showing the half-sunspot period for 120 years.}} |date=1919 |Source=''Climatic Cycles and Tree-Growth'' |Author=Andrew Ellicott Douglass |Permission= |o...