@misc{indiciae25b1b0e3c00b,
  title = {Sequential extraction techniques applied to a porphyry copper deposit in the basin and range province},
  author = {L.H. Filipek and P. K. Theobald},
  year = {1981},
  doi = {10.1016/0375-6742(81)90110-2},
  url = {https://pubs.usgs.gov/publication/70011916},
  note = {Source identifier: 70011916}
}