@misc{indiciaeca5d029b01a6,
  title = {Honduras, El Quetzal mine (antimony)},
  author = {Ralph Jackson Roberts},
  year = {1952},
  doi = {10.3133/ofr52128},
  url = {https://pubs.usgs.gov/publication/ofr52128},
  note = {Source identifier: ofr52128}
}