TY  - RPRT
TI  - Porphyry copper deposits of the world: Database and grade and tonnage models, 2008
AU  - Donald A. Singer
AU  - Vladimir I. Berger
AU  - Barry C. Moring
PY  - 2008
DO  - 10.3133/ofr20081155
UR  - https://pubs.usgs.gov/publication/ofr20081155
ID  - ofr20081155
ER  -