TY  - RPRT
TI  - A preliminary geologic map of the Rochford district, Black Hills, South Dakota
AU  - R. V. McGehee
AU  - R. W. Bayley
PY  - 1969
DO  - 10.3133/ofr69155
UR  - https://pubs.usgs.gov/publication/ofr69155
ID  - ofr69155
ER  -