@misc{indiciae8344634159db,
  title = {Maps showing ground-water conditions in the Ranegras plain and Butler valley areas, Yuma County, Arizona - 1975},
  author = {D. W. Wilkins and W.C. Webb},
  year = {1976},
  doi = {10.3133/wri7634},
  url = {https://pubs.usgs.gov/publication/wri7634},
  note = {Source identifier: wri7634}
}