Psaltis, June. 2001. ?Climate Response, Age Distribution, And Fire History Of A Corkbark Fir (Abies Lasiocarpa Var. Arizonica) Stand In The Santa Catalina Mountains, Arizona?. School Of Renewable Natural Resources. School Of Renewable Natural Resources. Tucson: University of Arizona.

Pedicino, Lisa Christina. 1997. ?Carbon Isotopic Variations In 7 Southwestern U.s. Plants From Herbarium Collections Of The Last 150 Years?. School Of Renewable Natural Resources. School Of Renewable Natural Resources. University of Arizona.

Pendall, Elise Gislaine. 1997. ?Precipitation Seasonality Recorded In D/h Ratios Of Pinyon Pine Cellulose In The Southwestern United States?. University of Arizona. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=736806701&sid=12&Fmt=2&clientId=43922&RQT=309&VName=PQD.

Perkins, Dana Lee. 1995. ?A Dendroecological Assessment Of Whitebark Pine In The Sawtooth Salmon River Region Idaho?. Department Of Renewable Natural Resources. Department Of Renewable Natural Resources. Tucson: University of Arizona.

Park, Wonkyu. 1990. ?Development Of Anatomical Tree-Ring Chonologies From Southern Arizona Conifers Using Image Analysis?. School Of Renewable Natural Resources. School Of Renewable Natural Resources. University of Arizona. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=744327611&sid=2&Fmt=2&clientId=43922&RQT=309&VName=PQD.

Parker, Marion L. 1967. ?Dendrochronology Of Point Of Pines?. Anthropology. Anthropology. University of Arizona.

Lockwood, Tommie E. 1966. ?A Comparative Anatomical Study On The Effects Of Mutant Genes On The Pericarp And Seed Coat Of Safflower (Carthamus Tinctorius L.)?. University of Arizona.

Stokes, M. 1965. ?The Differentiation Of Tracheary Elements From The Cambium Of Pinus Edulis Engelm: The Correlation Of Differentiation With Measured Ring Width And Environmental Factors?. Botany. Botany. University of Arizona.