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1
Geology and mineral resources of the Philipsburg 7 1/2-minute quadrangle, Pennsylvania /
by Glass, Gary B.
Harrisburg [Pa.] : Pennsylvania Bureau of Topographic and Geologic Survey, 1972

Government Document Book
2
Geology and mineral resources of the southern half of the Clearfield 15-minute quadrangle, Pennsylvania /
by Glover, Albert D.
Harrisburg, Pa. : Pennsylvania Bureau of Topographic and Geologic Survey, 1970

Government Document Book
3
Geology and mineral resources of the Ramey and Houtzdale quadrangles, Clearfield and Centre counties, Pennsylvania /
by Glass, Gary B.
Harrisburg, Pa. : Pennsylvania Bureau of Topographic and Geologic Survey, 1977

Government Document Book
4
Geology and mineral resources of the Hazen, Falls Creek, Reynoldsville, and Dubois quadrangles, Clearfield and Jefferson Counties, Pennsylvania /
by Glover, Albert D.
Harrisburg, Pa. : Pennsylvania Bureau of Topographic and Geologic Survey, 1978

Government Document Book
5
Geology and mineral resources of the northern half of the Houtzdale 15-minute quadrangle, Pennsylvania /
by Edmunds, William E.
Harrisburg, Pa. : Pennsylvania Bureau of Topographic and Geologic Survey, 1968

Government Document Book
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