Moran, Joseph Micheal. 1972. ?An Analysis Of Periglacial Climatic Indicators Of Late Glacial Time In North America?. University of Wisconsin. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=759016511&sid=7&Fmt=1&clientId=43922&RQT=309&VName=PQD.