@misc{indiciaeb1b0167b7608,
  title = {Arability map of the Phoenix area, Arizona},
  author = {U.S. Bureau of Reclamation and U.S. Bureau of Agriculture},
  year = {1973},
  doi = {10.3133/i845e},
  url = {https://pubs.usgs.gov/publication/i845E},
  note = {Source identifier: i845E}
}