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.

Sheppard, Paul. 1984. ?Fire Regime Of The Lodgepole Pine (Pinus Contorta Var. Murrayana) Forests Of The Mt. San Jacinto State Park Wilderness, California?. Ithaca: Cornell University.