@misc{indiciae3529ddb96b89,
  title = {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},
  author = {Gilpin R. Robinson and W. David Menzie},
  year = {2012},
  doi = {10.3133/sir20105090h},
  url = {https://pubs.usgs.gov/publication/sir20105090H},
  note = {Source identifier: sir20105090H}
}