@misc{indiciaeb2d05dc8dddf,
  title = {Hydrothermal alteration in Puerto Rican porphyry copper deposits},
  author = {Dennis P. Cox and Richard R. Larson and Richard B. Tripp},
  year = {1973},
  doi = {10.2113/gsecongeo.68.8.1329},
  url = {https://pubs.usgs.gov/publication/70241230},
  note = {Source identifier: 70241230}
}