J. D. Heffington No description specified. 1-2 (2 Records) Documents Letter Report: Surface Inventory Report, Texasgulf Soda Ash Division of Granger, Wyoming Core Hole #1-3-1911, 5-3-1911, 6-3-1911, 7-3-1911, 8-3-1911 (1981) Playa Project: Archaeological Investigations at the Texasgulf Tailing Pond #4, Sweetwater County, Wyoming (1982)