@proceedings {645,
	title = {Evidences of Cycles in Tree Ring Records},
	year = {1933},
	note = {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},
	keywords = {address, cycles, Douglass, evidence, historic, proceedings of the national academy of science, record, tree ring},
	author = {Douglass, A.E.}
}
@article {644,
	title = {Evidence of Climatic Effects in the Annual Rings},
	journal = {Ecology},
	volume = {1},
	year = {1920},
	keywords = {annual rings, climate, climatic, Douglass, Ecology, effect, effects, evidence, historic, rings, tree},
	author = {Douglass, A.E.}
}
@article {796,
	title = {El Cometa de Halley},
	year = {1910},
	note = {This title is available through the Tree Ring Laboratory; please contact the lab for more information. },
	address = {Tucson},
	keywords = {astronomy, comet, Douglass, espanol, halley, historic, newspaper, spanish, tucson},
	author = {Douglass, A.E.}
}
@article {691,
	title = {The Effects of Mountains On the Quality of the Atmosphere},
	year = {1899},
	keywords = {astronomy, atmosphere, Douglass, mountains},
	author = {Douglass, A.E.}
}
