@misc{indiciae9354252262ae,
  title = {Gneissic and igneous rocks of the Quadrilatero Ferrifero, Minas Gerais, Brazil},
  author = {Norman Herz},
  year = {1970},
  doi = {10.3133/pp641b},
  url = {https://pubs.usgs.gov/publication/pp641B},
  note = {Source identifier: pp641B}
}