Douglass, AE. Anon.1894. Gegenschein Observations.

Cathey, Everett Henry. Anon.1976. Geophysics Education in North America. Education Foundations and Administration. Education Foundations and Administration. University of Arizona. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=760459481&sid=8&Fmt=1&clientId=43922&RQT=309&VName=PQD.

McKenna, Peter,, and Windes, Thomas. Anon.2001. Going Against the Grain-Wood Production in Chacoan Society. American Antiquity. American Antiquity.

Herr, Sarah. Anon.1994. Great kivas as integrative architecture in the Silver Creek community, Arizona. Anthropology. Anthropology. University of Arizona. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=748072191&sid=58&Fmt=2&clientId=43922&RQT=309&VName=PQD.

Mutch, Linda Susan. Anon.1994. Growth responses of giant sequoia to fire and climate in Sequoia and Kings Canyon National Parks, California. University of Arizona. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=743039441&sid=4&Fmt=2&clientId=43922&RQT=309&VName=PQD.

Fritts, H. Anon.1966. Growth Rings of Trees: Their Correlation with Climate. Science. Science.

Burns, James M. Anon.1976. A Guide to Measuring Tree Ring Widths. Tucson: Laboratory of Tree Ring Research.