@article {768,
	title = {Tree-ring evidence of past climatic variability},
	journal = {Nature},
	volume = {276},
	year = {1978},
	note = {<p>Copies of this are available through the Tree Ring Laboratory. Please contact the lab for more information.</p>},
	keywords = {ancient, climate, environment, paleoclimatology, past, record, tree ring},
	author = {LaMarche, V.C.}
}
@booklet {759,
	title = {Paleoclimatology},
	year = {1973},
	keywords = {ancient, climate, dendrochronology, environment, paleoclimatology, tree rings},
	author = {Fritts, H.}
}
