Geology and mineral resources of the southern half of the Penfield 15-minute quadrangle, Pennsylvania /

by Edmunds, William E.
Harrisburg, Pa. : Pennsylvania. Bureau of Topographic and Geologic Survey, 1971

Geology and mineral resources of the southern half of the New Bloomfield quadrangle, Pennsylvania /

by Dyson, James L. (James Lindsay), 1912-1967
Harrisburg, Pa. : Pennsylvania Bureau of Topographic and Geologic Survey, 1967

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