@misc{indiciaef561dd1a0734,
  title = {Guides to exploration for coal deposits in Permo-Carboniferous rocks in Sao Paulo State, Brazil},
  author = {R. M. Flores},
  year = {1984},
  doi = {10.3133/ofr84264},
  url = {https://pubs.usgs.gov/publication/ofr84264},
  note = {Source identifier: ofr84264}
}