TY  - RPRT
TI  - Geologic map of the Black Hawk quadrangle, Gilpin, Jefferso,n and Clear Creek Counties, Colorado
AU  - Richard B. Taylor
PY  - 1976
DO  - 10.3133/gq1248
UR  - https://pubs.usgs.gov/publication/gq1248
ID  - gq1248
ER  -