Biblio
“Über Den Witterungseinfluß Auf Die Jahrringstruktur Der Gemeinen Keifer (Pinus Silvestris L.)”. University of Freiburg.
. 1984. . 2010.
“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.