@misc{indiciaec000fe2aba70,
  title = {Photogeologic map of the Navajo Mountain-15 quadrangle, San Juan County, Utah, and Navajo County, Arizona},
  author = {R.J. Hackman},
  year = {1956},
  doi = {10.3133/i185},
  url = {https://pubs.usgs.gov/publication/i185},
  note = {Source identifier: i185}
}