TY  - RPRT
TI  - Geology of the Wood and East Calhoun mines, Central City district, Gilpin County, Colorado
AU  - Avery Drake
PY  - 1957
DO  - 10.3133/b1032c
UR  - https://pubs.usgs.gov/publication/b1032C
ID  - b1032C
ER  -