Hydrogeology and groundwater quality of the glaciated valleys of Bradford, Tioga, and Potter counties, Pennsylvania / by John H. Williams, Larry E. Taylor, Dennis J. Low ; prepared by the United States Geological Survey, Water Resources Division, in cooperation with the Pennsylvania Geological Survey
v, 89 p. : ill., maps (some col.) ; 26 cm. + 2 maps
Accompanied by: Plate 1A., 1B. Surficial geologic map of major glaciated valleys of Bradford, Tioga, and Potter Counties, Pennsylvania, showing locations of wells, test holes, and data-collection sites. Scale 1:100,000.
Relief on maps shown by contours and spot heights.