TY  - RPRT
TI  - Economic filters for evaluating porphyry copper deposit resource assessments using grade-tonnage deposit models, with examples from the U.S. Geological Survey global mineral resource assessment: Chapter H in Global mineral resource assessment
AU  - Gilpin R. Robinson
AU  - W. David Menzie
PY  - 2012
DO  - 10.3133/sir20105090h
UR  - https://pubs.usgs.gov/publication/sir20105090H
ID  - sir20105090H
ER  -