Csank, Adam Zoltan. 2011. ?Deciphering Arctic Climate In A Past Greenhouse World: Multiproxy Reconstructions Of Pliocene Climate?. Geoscience. Geoscience. University of Arizona.

Cheng, Li. 2005. ?Elevated Atmospheric Carbon Dioxide Impacts Carbon Dynamics In A C(4)-Sorghum-Soil Agroecosystem: An Application Of Stable Carbon Isotopes (Delta Carbon-13) In Tracing The Fate Of Carbon In The Atmosphere-Plant-Soil Ecosystem?. University of Arizona. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=885700691&sid=10&Fmt=2&clientId=43922&RQT=309&VName=PQD.

Wright, William Edward. 2001. ?Delta-Deuterium And Delta-Oxygen-18 In Mixed Conifer Systems In The United States Southwest: The Potential Of Delta-Oxygen-18 In Pinus Ponderosa Tree Rings As A Natural Environmental Recorder?. Geoscience. Geoscience. University of Arizona. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=728996441&sid=11&Fmt=2&clientId=43922&RQT=309&VName=PQD.

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.

Leavitt, S. 1982. ?Inference Of Past Atmospheric Delta Carbon-13 And Atmospheric Carbon-Dioxide From Carbon-13/carbon-12 Measurements In Tree Rings?. Geosciences. Geosciences. University of Arizona. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=752855841&sid=22&Fmt=2&clientId=43922&RQT=309&VName=PQD.