@misc{indiciae521026ccbd32,
  title = {Topographic and geologic map of the Sain Alto mercury district, Municipio de Sain Alto, State of Zacatecas, Mexico},
  author = {Rafael Perez Siliceo and David Gallagher},
  year = {1966},
  doi = {10.3133/ofr66124},
  url = {https://pubs.usgs.gov/publication/ofr66124},
  note = {Source identifier: ofr66124}
}