@misc{indiciae64fcde65d2ab,
  title = {Photogeologic map of the Aneth-4 quadrangle, San Juan County, Utah},
  author = {R.J. Hackman},
  year = {1955},
  doi = {10.3133/i93},
  url = {https://pubs.usgs.gov/publication/i93},
  note = {Source identifier: i93}
}