@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.}
}
@proceedings {778,
	title = {Reports on the Conferences of Cycles},
	year = {1929},
	publisher = {Carneige Institution},
	address = {Washington, D.C. },
	keywords = {climate, conference, cycles, Douglass, environment, historic, tree},
	author = {Carneigie Institution of Washington}
}
@proceedings {738,
	title = {Dendrochronology and Studies in Cyclics},
	keywords = {conference, cycles, cyclics, dendrochronology, Douglass, historic},
	author = {Douglass, A.E.}
}
