@misc{indiciae68b3ab1a88bd,
  title = {Regional hydrogeology of the Navajo and Hopi Indian Reservations, Arizona, New Mexico, and Utah, with a section on vegetation},
  author = {M. E. Cooley and J. W. Harshbarger and J. P. Akers and W. F. Hardt and O.N. Hicks},
  year = {1969},
  doi = {10.3133/pp521a},
  url = {https://pubs.usgs.gov/publication/pp521A},
  note = {Source identifier: pp521A}
}