%0 Generic %D 1944 %T Tree Rings and Climatic Cycles, Laboratory of Tree-Ring Research, Astronomical Studies %A Peterson, Roy M. %A Douglass, A.E. %K astronomy %K climate %K dating %K dendrochronology %K Douglass %K environment %K fraternity %K historic %K tree ring %K tree ring laboratory %B Phi Kappa Phi Journal %I University of Arizona %C Tucson %V XXIV %N No. 3