@misc{indiciae4a7efbcdc51b,
  title = {Photogeologic map of Setsiltso Springs 4 quadrangle, Apache County, Arizona},
  author = {Richard G. Ray},
  year = {1952},
  doi = {10.3133/ofr52118},
  url = {https://pubs.usgs.gov/publication/ofr52118},
  note = {Source identifier: ofr52118}
}