Garfin, Gregg Marc. 1998. ?Sierra Nevada Tree Rings And Atmospheric Circulation?. Geoscience. Geoscience. University of Arizona. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=733009441&sid=28&Fmt=2&clientId=43922&RQT=309&VName=PQD.