@misc{indiciaee13598f834d2,
  title = {Distribution of selected trace and major elements around the massive sulfide deposit at the Penn mine, California},
  author = {J.A. Peterson},
  year = {1988},
  doi = {10.2113/gsecongeo.83.2.419},
  url = {https://pubs.usgs.gov/publication/70014135},
  note = {Source identifier: 70014135}
}