@misc{indiciae2bd5f5c554fe,
  title = {Tectonic studies in the Brazilian shield},
  author = {Avery Ala Drake and B. A. Morgan},
  year = {1980},
  doi = {10.3133/pp1119ab},
  url = {https://pubs.usgs.gov/publication/pp1119AB},
  note = {Source identifier: pp1119AB}
}