TY  - BOOK
AU  - O'Harra,Cleophas C.
TI  - The mineral wealth of the Black Hills
T2  - South Dakota School of Mines. Bulletin no. 6. Department of geology
AV  - TN24.S8 A3 no. 6
PY  - 1902///
CY  - Rapid City, S.D.
KW  - Mines and mineral resources
KW  - South Dakota
N1  - "Published also as a part of Bulletin no. 3 of the South Dakota Geological Survey."
ER  -