Search Results

61

Geology and mineral resources of the Sabula and Penfield quadrangles, Clearfield, Elk, and Jefferson Counties, Pennsylvania /

by Berg, Thomas M., Glover, Albert D.
Harrisburg : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1976

Book

62

Oil and gas developments in Pennsylvania in 1958 /

by Lytle, William S.
[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Dept. of Internal Affairs, Topographic and Geologic Survey, 1959

Book

63

Curwensville quadrangle : geology and mineral resources /

by Ashley, Geo. H. (George Hall), 1866-1951
[Harrisburg] : Department of internal affairs, Topographic and geologic survey, 1940

Book

64

Revised lithostratigraphic nomenclature of the Pottsville and Allegheny groups (Pennsylvanian), Clearfield County, Pennsylvania /

by Edmunds, William E.
Harrisburg, Pa. : Bureau of Topographic and Geologic Survey, 1969

Book

65

Preliminary report : geologic structure of parts of the Chestnut Ridge and Driftwood anticlines in Clearfield and Elk Counties, Pennsylvania /

by Bolger, Robert C.
Harrisburg : Commonwealth of Pennsylvania, Topographic and Geological Survey, 1953

Book

66

Geology and mineral resources of the Philipsburg 7 1/2-minute quadrangle, Pennsylvania /

by Glass, Gary B.
Harrisburg : [Commonwealth of Pennsylvania, Department of Environmental Resources, Bureau of Topographic and Geologic Survey], 1974

Book

Narrow Search