TY - RPRT T1 - Steward Observatory Y1 - 1939 A1 - Douglass, A.E. KW - annual report KW - Douglass KW - steward observatory JF - Annual Report of the University of Arizona N1 - Copies of this are available in the Tree Ring Laboratory, please contact the curator for more information. pcreasman@ltrr.arizona.edu ER -