@misc{indiciae146a8f30def4,
  title = {Stratigraphic nomenclature of Cambrian and Lower Ordovician rocks of easternmost southern Arizona and adjacent westernmost New Mexico},
  author = {Philip Thayer Hayes},
  year = {1972},
  doi = {10.3133/b1372b},
  url = {https://pubs.usgs.gov/publication/b1372B},
  note = {Source identifier: b1372B}
}