@misc{indiciae5ef88f60c669,
  title = {Preliminary report on the Serra de Navio manganese district, Territory of Amapa, Brazil},
  author = {John Van N. Dorr and Philip White Guild},
  year = {1948},
  doi = {10.3133/ofr4829},
  url = {https://pubs.usgs.gov/publication/ofr4829},
  note = {Source identifier: ofr4829}
}