@misc{indiciae21a7fb99513e,
  title = {Geology and ore deposits of the Atacocha district, Departamento de Pasco, Peru},
  author = {Robert F. Johnson and R.W. Lewis and Guillermo Abele C.},
  year = {1955},
  doi = {10.3133/b975e},
  url = {https://pubs.usgs.gov/publication/b975E},
  note = {Source identifier: b975E}
}