@misc{indiciae452ed3afed20,
  title = {Cambrian and Ordovician rocks of southern Arizona and New Mexico and westernmost Texas},
  author = {Philip Thayer Hayes and George C. assisted by Cone},
  year = {1975},
  doi = {10.3133/pp873},
  url = {https://pubs.usgs.gov/publication/pp873},
  note = {Source identifier: pp873}
}