@misc{indiciae950b7188c6b9,
  title = {Photogeologic maps of the Verdure 1, 2, 4, 6, 7, and 8 quadrangles, Utah and Colorado},
  author = {Robert J. Hackman},
  year = {1952},
  doi = {10.3133/ofr5263},
  url = {https://pubs.usgs.gov/publication/ofr5263},
  note = {Source identifier: ofr5263}
}