@misc{indiciaee7ab85d2f0cc,
  title = {Lead-zinc deposits of the Boquira district, State of Bahia, Brazil},
  author = {Robert Francis Johnson},
  year = {1962},
  doi = {10.3133/b1110a},
  url = {https://pubs.usgs.gov/publication/b1110A},
  note = {Source identifier: b1110A}
}