@misc{indiciaeaace08d2fa08,
  title = {Digital data base application to porphyry copper mineralization in Alaska; case study summary},
  author = {Charles M. Trautwein and David D. Greenlee and Donald G. Orr},
  year = {1982},
  doi = {10.3133/ofr82801},
  url = {https://pubs.usgs.gov/publication/ofr82801},
  note = {Source identifier: ofr82801}
}