Hallman, Christine Lee. 2010. ?Unraveling Environmental Factors That Affect Pinus Longaeva Growth In The White Mountains, California?. Geography. Geography. University of Arizona. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=2108905281&sid=32&Fmt=2&clientId=43922&RQT=309&VName=PQD.

Hallman, Christine Lee. 2001. ?Spatial Relationships In Frost-Damaged High-Elevation Pines And Links To Major Volcanic Eruptions?. Geoscience. Geoscience. Tucson: University of Arizona.