@misc{indiciaef0e415586498,
  title = {Photogeologic map of the Circle Cliffs-12 quadrangle, Garfield County, Utah},
  author = {R.J. Hackman},
  year = {1955},
  doi = {10.3133/i52},
  url = {https://pubs.usgs.gov/publication/i52},
  note = {Source identifier: i52}
}