Mineral deposits and occurences in Massachusetts and Rhode Island, exclusive of clay, sand and gravel, and peat

Veröffentlicht 1956

Corundum mining in the Piedmont Province of Pennsylvania

von Pearre, Nancy C.
Veröffentlicht 1958

Mineral deposits and occurences in New Hampshire exclusive of clay, sand and gravel, and peat

Veröffentlicht 1957

Mineral deposits and occurences in Vermont exclusive of clay, sand and gravel, and peat

Veröffentlicht 1957

Copper, zinc, lead, iron, cobalt, and barite deposits in the Piedmont upland of Maryland

von Heyl, Allen V.
Veröffentlicht 1965

Chromite and other mineral deposits in serpentine rocks of the Piedmont upland, Maryland, Pennsylvania and Delaware

von Pearre, Nancy C.
Veröffentlicht 1960