@article {749,
	title = {Climatic Information from Analysis of Cellulose Lignin and Whole Wood from Tree Rings},
	volume = {270},
	year = {1977},
	note = {Copies of this are available from the Tree Ring Laboratory. Please contact the curator for more information. pcreasman@ltrr.arizona.edu},
	keywords = {analysis, cellulose, climate, dendrochronology, lignin, tree ring, tree rings},
	author = {unknown}
}
@article {767,
	title = {Climatic Information from Ratios of Cellulose in Tree Rings},
	journal = {Nature},
	volume = {262},
	year = {1976},
	keywords = {18 isotope, cellulose, climate, environment, O, oxygen, paleoclimatology, ratios, tree rings},
	author = {Gray, John and Thompson, Peter}
}
