@article {748,
	title = {Analysis of Tree Rings and Climatic Changes},
	year = {1978},
	keywords = {changes, climate, dendrochronology, environment, tree rings},
	author = {unknown}
}
@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}
}
