@misc{indiciaec7016e0f848e,
  title = {Tin deposits of the Republic of Mexico},
  author = {William F. Foshag and Carl Fries},
  year = {1942},
  doi = {10.3133/b935c},
  url = {https://pubs.usgs.gov/publication/b935C},
  note = {Source identifier: b935C}
}