@misc{indiciae94e5625a975c,
  title = {Spring flow from pre-Pennsylvanian rocks in the southwestern part of the Navajo Indian Reservation, Arizona},
  author = {M. E. Cooley},
  year = {1976},
  doi = {10.3133/pp521f},
  url = {https://pubs.usgs.gov/publication/pp521F},
  note = {Source identifier: pp521F}
}