581.134152
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Douglass , Andrew Ellicott , 1867-
Climatic cycles and tree-growth ; a study of the annual rings of trees in relation to climate and solar activity by A. E. Douglasss . 
Washington , Carnegie Instutionof Washington , 1919
127 p. ilus. láms. 25 cm. (Carnegie Institution of Washington. Publication no. 289)
"Bibliography " : p. 124 -127