TY  - RPRT
TI  - Geologic map of the Empire quadrangle, Grand, Gilpin, and Clear Creek Counties, Colorado
AU  - William A. Braddock
PY  - 1967
DO  - 10.3133/ofr6727
UR  - https://pubs.usgs.gov/publication/ofr6727
ID  - ofr6727
ER  -