@misc{indiciae76c9b379f14d,
  title = {Geologic map of the Rio Piracicaba quadrangle, Minas Gerais, Brazil},
  author = {Robert G. Reeves},
  year = {1961},
  doi = {10.3133/ofr61126},
  url = {https://pubs.usgs.gov/publication/ofr61126},
  note = {Source identifier: ofr61126}
}