@misc{indiciae5f3b2658553d,
  title = {Geology and mineral deposits of the San Cristobal district, Villa Martin Province, Potosi, Bolivia},
  author = {H.S. Jacobson and Carlos Murillo and Lorgio Ruiz and Oscar Tapia and Hugo Zapata and Hugo Alarcon and Edgar Delgadillo and Carlos Velasco},
  year = {1967},
  doi = {10.3133/ofr67120},
  url = {https://pubs.usgs.gov/publication/ofr67120},
  note = {Source identifier: ofr67120}
}