Grissino-Mayer, Henri Dee. 1988. ?Tree Rings Of Shortleaf Pine (Pinus Echinata Mill.) As Indicators Of Past Climatic Variability In North Central Georgia?. University of Georgia. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=754453701&sid=2&Fmt=2&clientId=43922&RQT=309&VName=PQD.