@misc{indiciae820b60ffa182,
  title = {Reserves and production data for selected ore deposits in the United States found in the files of the Anaconda Copper Company},
  author = {Keith R. Long},
  year = {1992},
  doi = {10.3133/ofr922},
  url = {https://pubs.usgs.gov/publication/ofr922},
  note = {Source identifier: ofr922}
}