Prosser, L. J. (Leonard J.) The mineral industry of Pennsylvania in 1985 / L.J. Prosser, Jr., Robert C. Smith, II.

Prosser, L. J. (Leonard J.)

The mineral industry of Pennsylvania in 1985 / L.J. Prosser, Jr., Robert C. Smith, II.

[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Office of Resources Management, Bureau of Topographic and Geologic Survey, 1987.

Preprinted from the 1985 Bureau of Mines Mineral Yearbook, United States Dept. of the Interior.

Cover title.

Includes bibliographical references.

Mines and mineral resources -- Pennsylvania.

Mineral industries -- Pennsylvania.

Smith, Robert C.

Pennsylvania. Bureau of Topographic and Geologic Survey

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