@misc{indiciae2fd15e82ad10,
  title = {Geologic map of Quadrilatero Ferrifero, Minas Gerais, Brazil},
  author = {John Van N. Dorr},
  year = {1966},
  doi = {10.3133/ofr6627},
  url = {https://pubs.usgs.gov/publication/ofr6627},
  note = {Source identifier: ofr6627}
}