Search Results
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1
Natural gamma aeroradioactivity map of the Pittsburgh area, Pennsylvania, Ohio, West Virginia, and Maryland
Published: U.S. Geological Survey, 1966Description: 1 map : color ; 78 x 85 cm.Map -
2
Map showing depths to the Pittsburgh coal bed, mining activity, and related surface subsidence, Allegheny, Washington, and Westmoreland counties, Pennsylvania
Published: U.S. Geological Survey, 1975Description: 1 map ; 60 x 108 cm.Map