Biblio
“Climatic Information From Ratios Of Cellulose In Tree Rings”. Nature 262 (No. 5568). Nature.
. 1976. “Tree Rings And Climatic Cycles, Laboratory Of Tree-Ring Research, Astronomical Studies”. Phi Kappa Phi Journal. Phi Kappa Phi Journal. Tucson: University of Arizona.
. 1944. 
“The Use And Limitation Of Dendrochronology In Studying The Effects Of Air Pollution On Forests”. Proceedings Of Nato Advanced Research Workshop: Effects Of Acidic Deposition On Forests, Wetlands And Agricultural Ecosystems. Proceedings Of Nato Advanced Research Workshop: Effects Of Acidic Deposition On Forests, Wetlands And Agricultural Ecosystems.
. 1985. “Reports On The Conferences Of Cycles”. Washington, D.C. : Carneige Institution.
. 1929. 
Climate From Tree Rings. Cambridge University Press.
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