@misc{indiciae3ac3ee92d614,
  title = {Map showing distribution of recoverable ground water in the Tucson area, Arizona},
  author = {W. R. Osterkamp},
  year = {1973},
  doi = {10.3133/i844f},
  url = {https://pubs.usgs.gov/publication/i844F},
  note = {Source identifier: i844F}
}