Petty Ray Geophysical, Inc., Denver, Co No description specified. 1-3 (3 Records) Documents Anasazi Site Type and Context As Observed Through an Archaeological Survey of 65 Miles of Seismic Corridor, San Juan County, Utah (1984) Archaeological Survey of 195.5 Miles of Seismic Line in San Juan County, Utah (1983) Archaeological Survey of Two Seismic Lines in San Juan County, Utah (1984)