TY  - RPRT
TI  - Geologic and structure contour map of the northern and western flanks of the Black Hills, Wyoming, Montana, and South Dakota
AU  - W. J. Mapel
AU  - Charles Sherwood Robinson
AU  - P. K. Theobald
PY  - 1959
DO  - 10.3133/om191
UR  - https://pubs.usgs.gov/publication/om191
ID  - om191
ER  -