Farris, Calvin Arthur. 2009. ?Spatial And Temporal Validation Of Fire-Scar Fire Histories?. Geography. Geography. University of Arizona. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=1937808421&sid=2&Fmt=2&clientId=43922&RQT=309&VName=PQD.