@misc{indiciaec7dca716611e,
  title = {Metallic ore deposits, mineral deposits and prospects of the I, II, III, IV, and V regions, northern Chile},
  author = {William C. Williams},
  year = {1992},
  doi = {10.3133/ofr9217},
  url = {https://pubs.usgs.gov/publication/ofr9217},
  note = {Source identifier: ofr9217}
}