@misc{indiciaef4e7f478349a,
  title = {Some manganese deposits in the Republic of Panama},
  author = {Frank S. Simons},
  year = {1951},
  doi = {10.3133/ofr5180},
  url = {https://pubs.usgs.gov/publication/ofr5180},
  note = {Source identifier: ofr5180}
}