@misc{indiciae69f6e6d0dbda,
  title = {Manganese deposits of the Serra do Navio district, Territory of Amapa, Brazil},
  author = {John Van N. Dorr and Charles Frederick Park and Glycon de Paiva Teixeira},
  year = {1949},
  doi = {10.3133/b964a},
  url = {https://pubs.usgs.gov/publication/b964A},
  note = {Source identifier: b964A}
}