@misc{indiciae25072631f9aa,
  title = {The manganese and iron deposits of Morro de Urucum, Mato Grosso, Brazil},
  author = {J. V. N. Dorr and C.W. Buckey},
  year = {1945},
  doi = {10.3133/ofr4564},
  url = {https://pubs.usgs.gov/publication/ofr4564},
  note = {Source identifier: ofr4564}
}