Margolis, Ellis Quinn. 2007. ?Fire History And Fire Climate Relationships In Upper Elevation Forests Of The Southwestern United States?. School Of Natural Resources. School Of Natural Resources. Tucson: University of Arizona. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=1375523671&sid=1&Fmt=2&clientId=43922&RQT=309&VName=PQD.