Sullivan, Alan. 1980. ?Prehistoric Settlement Variability In The Grosshopper Area, East-Central Arizona?. Anthropology. Anthropology. University of Arizona. http://ezproxy.library.arizona.edu/login?url=http://proquest.umi.com/pqdweb?did=749715921&sid=26&Fmt=2&clientId=43922&RQT=309&VName=PQD.