Biblio

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1933
Douglass, AE. 1933. Evidences Of Cycles In Tree Ring Records. Proceedings Of The National Academy Of The Sciences. Proceedings Of The National Academy Of The Sciences.
PDF icon Douglass, AE_Evidences of Cycles in Tree RIng Records_1933.pdf (11.71 MB)
1910
Douglass, AE. 1910. El Cometa De Halley. Tucson Citizen. Tucson Citizen.