@misc{indiciaead1d196f5c71,
  title = {Copper deposits of the southern Appalachian region; discussion},
  author = {Clarence Samuel Ross},
  year = {1936},
  doi = {10.2113/gsecongeo.31.4.428},
  url = {https://pubs.usgs.gov/publication/70212848},
  note = {Source identifier: 70212848}
}