TY  - RPRT
TI  - Grade and tonnage model for tungsten skarn deposits—2020 update
AU  - Carlin J. Green
AU  - Graham W. Lederer
AU  - Heather L. Parks
AU  - Michael L. Zientek
PY  - 2020
DO  - 10.3133/sir20205085
UR  - https://pubs.usgs.gov/publication/sir20205085
ID  - sir20205085
ER  -