TY  - RPRT
TI  - Grade-tonnage model of hot-spring gold-silver; a supplement to U.S. Geological Survey Bulletin 1693
AU  - B. R. Berger
AU  - D.A. Singer
PY  - 1987
DO  - 10.3133/ofr87272c
UR  - https://pubs.usgs.gov/publication/ofr87272C
ID  - ofr87272C
ER  -