@misc{indiciae29eff558b38d,
  title = {Photogeologic map of the Yellow Jacket quadrangle, Montezuma and Dolores Counties, Colorado},
  author = {R.J. Hackman},
  year = {1959},
  doi = {10.3133/i281},
  url = {https://pubs.usgs.gov/publication/i281},
  note = {Source identifier: i281}
}