@misc{indiciaeac27b40fd28b,
  title = {Photogeologic map of the Mount Peale-7 quadrangle, San Juan County, Utah},
  author = {R.J. Hackman},
  year = {1956},
  doi = {10.3133/i183},
  url = {https://pubs.usgs.gov/publication/i183},
  note = {Source identifier: i183}
}