@misc{indiciae10b4a56e17ba,
  title = {Ground-water supplies and irrigation in San Pedro Valley, Arizona},
  author = {Kirk Bryan and G. E. P. Smith and Gerald A. Waring},
  year = {1934},
  doi = {10.3133/ofr6731},
  url = {https://pubs.usgs.gov/publication/ofr6731},
  note = {Source identifier: ofr6731}
}