@misc{indiciae78418e37d0fa,
  title = {Photogeologic map of the Bluff-6 quadrangle, San Juan County, Utah},
  author = {P. P. Orkild},
  year = {1955},
  doi = {10.3133/i53},
  url = {https://pubs.usgs.gov/publication/i53},
  note = {Source identifier: i53}
}