@misc{indiciae46ebf68e355d,
  title = {Photogeologic map of the Bluff-3 quadrangle, San Juan County, Utah},
  author = {C. H. Marshall},
  year = {1956},
  doi = {10.3133/i181},
  url = {https://pubs.usgs.gov/publication/i181},
  note = {Source identifier: i181}
}