@misc{indiciae15ffb3fc57b3,
  title = {Maps showing ground-water conditions in the Yuma area, Yuma County, Arizona, 1975},
  author = {D. W. Wilkins},
  year = {1978},
  doi = {10.3133/wri7862},
  url = {https://pubs.usgs.gov/publication/wri7862},
  note = {Source identifier: wri7862}
}