@misc{indiciae490fbe877e05,
  title = {Photogeologic map of the Navajo Mountain-8 quadrangle, San Juan County, Utah},
  author = {A. B. Olson},
  year = {1957},
  doi = {10.3133/i221},
  url = {https://pubs.usgs.gov/publication/i221},
  note = {Source identifier: i221}
}