Lloyd, Andrea. 1996. ?Patterns And Processes Of Treeline Forest Response To Late Holocene Climate Change In The Sierra Nevada, California?. Biology. Biology. University of Arizona. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=742626921&sid=20&Fmt=2&clientId=43922&RQT=309&VName=PQD.