Tsuchiya, Akio. 1990. ?Influence Of Water Balance On The Caatinga Stand In The Semi-Arid Interior, Northeast Brazil?. University of Tsukuba.

Biondi, Franco. 1987. ?Influence Of Gambel Oak On Radial Growth Of Southwestn Ponderosa Pine: A Dendrochronological Study?. 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=754449011&sid=5&Fmt=2&clientId=43922&RQT=309&VName=PQD.

O?Rourke, Mary Kay. 1986. ?The Implications Of Atmospheric Pollen Rain For Fossil Pollen Profiles In The Arid Southwest?. Geoscience. Geoscience. University of Arizona. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=748690901&sid=6&Fmt=2&clientId=43922&RQT=309&VName=PQD.

Ahlstrom, Richard Van Ness. 1985. ?The Interpretation Of Archaeological Tree-Ring Dates?. Anthropology. Anthropology. University of Arizona. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=752229261&sid=1&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.

Webb, GE. 1978. ?The Infatigable Astronomer?. The Journal Of Arizona History. The Journal Of Arizona History.

Ferguson, CW. 1968. ?Interim Progress Report Dendrochronology Of Bristlecone Pine?. Tucson: Laboratory of Tree-Ring Research.

Ferguson, CW. 1966. ?Interim Report On The Dendrochronology Of Bristlecone Pine Prior To 4,000 B.c.?.

Dodge, Richard Archie. 1963. ?Investigtions Into The Ecological Relationships Of Ponderosa Pine In Southeast Arizona?. Botany. Botany. University of Arizona. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=763081241&sid=6&Fmt=1&clientId=43922&RQT=309&VName=PQD.

Douglass, AE. 1907. ?The Illusions Of Vision And The Canals Of Mars?. Popular Science Monthly. Popular Science Monthly.

Douglass, AE. 1892. ?Indicacinoes Sobre Un Period Lluvioso En El Sur Del Peru?.

Douglass, AE. 1892. ?Indications Of A Rainy Period In Southern Peru?. Science. Science.