Biblio
“Evidences Of Cycles In Tree Ring Records”. Proceedings Of The National Academy Of The Sciences. Proceedings Of The National Academy Of The Sciences.
. 1933. Douglass, AE_Evidences of Cycles in Tree RIng Records_1933.pdf (11.71 MB)“Physical Geography”. Tempe Normal School. Tempe Normal School.
. 1906. . 1925. Douglass, AE_Phi Kappa Phi Installation Address_1925.pdf (3.45 MB)
. 1923. Douglass, AE_Historical Address_1923.pdf (6.29 MB)
“Address At High School On Halleys Comet”. Tucson Citizen. Tucson Citizen.
. 1910.