@misc{indiciaeb432331a8315,
  title = {Photogeologic map of the Mt. Pennell-5 quadrangle, Garfield County, Utah},
  author = {R.J. Hackman},
  year = {1955},
  doi = {10.3133/i46},
  url = {https://pubs.usgs.gov/publication/i46},
  note = {Source identifier: i46}
}