Petty Ray, Unknown Location No description specified. 1-3 (3 Records) Documents Letter Report: Archeological Surface Investigations of a Seismograph Line, Line #6 (1979) Letter Report: Archeological Surface Investigations of Two USFS Parcels Crossed By a Seismic Line, Cdp 9893 (1979) Letter Report: Archeological Surface Investigations On a Seismograph Line, Line #4 (1979)