TY - Generic T1 - Tree Rings and Climatic Cycles, Laboratory of Tree-Ring Research, Astronomical Studies Y1 - 1944 A1 - Peterson, Roy M. A1 - Douglass, A.E. KW - astronomy KW - climate KW - dating KW - dendrochronology KW - Douglass KW - environment KW - fraternity KW - historic KW - tree ring KW - tree ring laboratory JF - Phi Kappa Phi Journal PB - University of Arizona CY - Tucson VL - XXIV IS - No. 3 ER -