@misc{indiciae8e8974c5a1b6,
  title = {Map and table of world copper smelters},
  author = {Calix Saul Laboy-Feliciano and Elizabeth Gonzalez},
  year = {2003},
  doi = {10.3133/ofr0375},
  url = {https://pubs.usgs.gov/publication/ofr0375},
  note = {Source identifier: ofr0375}
}