@misc{indiciaef462ff1c6e27,
  title = {Devonian and Mississippian rocks of central Arizona},
  author = {John W. Huddle and Ernest Dobrovolny},
  year = {1952},
  doi = {10.3133/pp233d},
  url = {https://pubs.usgs.gov/publication/pp233D},
  note = {Source identifier: pp233D}
}