@misc{indiciaeafd0567eff79,
  title = {Geohydrology and water resources of the Tucson basin, Arizona},
  author = {Edward Sheldon Davidson},
  year = {1973},
  doi = {10.3133/wsp1939e},
  url = {https://pubs.usgs.gov/publication/wsp1939E},
  note = {Source identifier: wsp1939E}
}