Douglas, Diane. 1998. ?Temperature Reconstructions Spanning The Continental Divide: Bristlecone And Limber Pine Trees As Proxy Data?. Geology. Geology. Arizona State University. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=732946061&sid=18&Fmt=2&clientId=43922&RQT=309&VName=PQD.

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Ferguson, CW. 1983. ?Bristlecone Pine Project Status?.

Ferguson, CW. 1980. ?Unsolicited Proposal Submitted To The Department Of Energy For Dendrochronology Of Bristlecone Pine?. Tucson: Laboratory of Tree-Ring Research.