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CLIMATIC CYCLES AND TREE-GROWTH
A STUDY OF THE ANNUAL RINGS OF TREES IN RELATION TO CLIMATE AND SOLAR ACTIVITY
By A. E. Douglass
Director of Steward Observatory, University of Arizona
7
CLIMATIC CYCLES AND TREE-GROWTH
A STUDY OF THE ANNUAL RINGS OF TREES IN RELATION TO CLIMATE AND SOLAR ACTIVITY
By A. E. Douglass
Director of Steward Observatory, University of Arizona
7