Petty-Ray Geophysical, Craig, Co No description specified. 1-2 (2 Records) Documents Archaeological Survey of Petty-Ray Geophysical's Stove Gulch Line No. 2 Rio Blanco County, Colorado (1984) Archaeological Survey of Petty-Ray Geophysicals' kodiak Unes 1 and 2, Moffat County, Colorado (1984)