@misc{indiciae13ba1d9c757e,
  title = {Maps showing ground-water conditions in the Monument Valley and northern part of the Black Mesa areas, Navajo, Apache, and Coconino counties, Arizona, 1976},
  author = {G. W. Levings and C. D. Farrar},
  year = {1977},
  doi = {10.3133/wri7744},
  url = {https://pubs.usgs.gov/publication/wri7744},
  note = {Source identifier: wri7744}
}