@misc{indiciae304f52bdf529,
  title = {General geology and phosphate deposits of Concepcion del Oro district, Zacatecas, Mexico},
  author = {Cleaves Lincoln Rogers and Zoltan de Cserna and Eugenio Tavera and Salvador Ulloa},
  year = {1956},
  doi = {10.3133/b1037a},
  url = {https://pubs.usgs.gov/publication/b1037A},
  note = {Source identifier: b1037A}
}