@misc{indiciaecb9d1f10c0da,
  title = {Photogeologic map of the Circle Cliffs-16 quadrangle, Garfield and Kane Counties, Utah},
  author = {R.J. Hackman},
  year = {1955},
  doi = {10.3133/i31},
  url = {https://pubs.usgs.gov/publication/i31},
  note = {Source identifier: i31}
}