Woodhouse, Connie Ann. 1996. ?Climate Variability In The Southwestern United States As Reconstructed From Tree-Ring Chronologies?. University of Arizona. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=739718221&sid=24&Fmt=2&clientId=43922&RQT=309&VName=PQD.