TY  - RPRT
TI  - Geologic map of the Black Hills area, South Dakota and Wyoming
AU  - Ed DeWitt
AU  - J. A. Redden
AU  - D. P. Buscher
AU  - A.B. Wilson
PY  - 1989
DO  - 10.3133/i1910
UR  - https://pubs.usgs.gov/publication/i1910
ID  - i1910
ER  -