TY  - RPRT
TI  - Assessment of undiscovered copper resources of the world, 2015
AU  - Jane M. Hammarstrom
AU  - Michael L. Zientek
AU  - Heather L. Parks
AU  - Connie L. Dicken
AU  - U.S. Geological Survey Global Copper Mineral Resource Assessment Team
PY  - 2019
DO  - 10.3133/sir20185160
UR  - https://pubs.usgs.gov/publication/sir20185160
ID  - sir20185160
ER  -