TY  - RPRT
TI  - Silver-bearing black calcite in western mining districts
AU  - D. F. Hewett
AU  - A. S. Radtke
PY  - 1967
DO  - 10.2113/gsecongeo.62.1.1
UR  - https://pubs.usgs.gov/publication/70210850
ID  - 70210850
ER  -