TY - CONF T1 - Tree Growth and Solar Cycles T2 - Paper Presented at International Research Council Y1 - 1931 A1 - Douglass, A.E. KW - astronomy KW - Douglass KW - historic KW - solar cycles KW - tree growth JF - Paper Presented at International Research Council N1 - Copies of this are available through the Tree Ring Laboratory. Please contact the curator for more information. pcreasman@ltrr.arizona.edu ER -