@misc{indiciae229ce0c2c3f6,
  title = {Preliminary model of porphyry copper deposits},
  author = {Byron R. Berger and Robert A. Ayuso and Jeffrey C. Wynn and Robert R. Seal},
  year = {2008},
  doi = {10.3133/ofr20081321},
  url = {https://pubs.usgs.gov/publication/ofr20081321},
  note = {Source identifier: ofr20081321}
}