Map showing locations of mines, prospects, and patented mining claims, and classification of mineral deposits in the Mount Rushmore 7 1/2- minute Quadrangle, Black Hills, South Dakota
1988 ◽
1988 ◽
Map of mines, prospects, and patented mining claims, and classification of mineral deposits in the Rockerville 7 1/2 minute Quadrangle, Black Hills, South Dakota
1988 ◽