Investigation of the Critchfield Manganese Deposit, Huntingdon County, Pa W. H. Kerns Published: 1948 Total Pages: 16 Get eBook
Investigation of Simon & Coles Manganese Deposit Bedford County, Pa W. H. Kerns Published: 1948 Total Pages: 176 Get eBook
Bureau of Mines Strategic Minerals Development Program Lowell B. Moon Published: 1950 Total Pages: 68 Get eBook
List of Publications, Bureau of Mines United States. Bureau of Mines Published: 1960 Total Pages: 846 Get eBook
