@misc{indiciae78e9c0de303a,
  title = {Coal deposits of the Santa Clara district, near Tonichi, Sonora, Mexico},
  author = {Ivan Franklin Wilson and Victor S. Rocha},
  year = {1949},
  doi = {10.3133/b962a},
  url = {https://pubs.usgs.gov/publication/b962A},
  note = {Source identifier: b962A}
}