TY  - BOOK
AU  - Rothrock,E.P.
TI  - A quarter century of mineral production,
T2  - South Dakota Geological Survey. Report of investigations,
AV  - TN24.S8 R62
PY  - 1932///
CY  - Vermillion, South Dakota
PB  - University of South Dakota
KW  - Mines and mineral resources
KW  - South Dakota
N1  - At head of title: South Dakota State Geological Survey, E. P. Rothrock, State Geologist; Reproduced from type-written copy
ER  -