TY  - RPRT
TI  - Preliminary report on the economic geology of Gilpin County, Colorado
AU  - E.S. Bastin
AU  - J. M. Hill
PY  - 1916
DO  - 10.3133/b620m
UR  - https://pubs.usgs.gov/publication/b620M
ID  - b620M
ER  -