Biblio
“Using False Rings To Reconstruct Local Drought Severity Patterns On A Semiarid River”. Geography And Regional Development. Geography And Regional Development. University of Arizona. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=1500068401&sid=3&Fmt=2&clientId=43922&RQT=309&VName=PQD.
. 2008. “The Use And Limitation Of Dendrochronology In Studying The Effects Of Air Pollution On Forests”. Proceedings Of Nato Advanced Research Workshop: Effects Of Acidic Deposition On Forests, Wetlands And Agricultural Ecosystems. Proceedings Of Nato Advanced Research Workshop: Effects Of Acidic Deposition On Forests, Wetlands And Agricultural Ecosystems.
. 1985. “Über Den Witterungseinfluß Auf Die Jahrringstruktur Der Gemeinen Keifer (Pinus Silvestris L.)”. University of Freiburg.
. 1984. “Unsolicited Proposal Submitted To The Department Of Energy For Dendrochronology Of Bristlecone Pine”. Tucson: Laboratory of Tree-Ring Research.
. 1980. 
“University Of Arizona Eclipse Expedition”. Popular Astronomy. Popular Astronomy.
. 1923. 
“University Of Arizona Eclipse Expedition, Port Libertad, Sonora, Mexico”. Publications Of The Astronomical Society Of The Pacific XXXVI (No. 212). Publications Of The Astronomical Society Of The Pacific.
. 1923. 