@misc{indiciaec6a5a6b2950c,
  title = {Photogeologic map, Mount Pennell 5 quadrangle, Garfield County, Utah},
  author = {R.J. Hackman},
  year = {1953},
  doi = {10.3133/ofr5398},
  url = {https://pubs.usgs.gov/publication/ofr5398},
  note = {Source identifier: ofr5398}
}