TY - Generic T1 - Evidences of Cycles in Tree Ring Records T2 - Proceedings of the National Academy of the Sciences Y1 - 1933 A1 - Douglass, A.E. KW - address KW - cycles KW - Douglass KW - evidence KW - historic KW - proceedings of the national academy of science KW - record KW - tree ring JF - Proceedings of the National Academy of the Sciences N1 - This is available as a physical and electronic copy through the Tree Ring Lab. Please contact the curator for more information. pcreasman@ltrr.arizona.edu ER -