@misc{indiciaef3a70397936d,
  title = {Photogeologic map of the Norwood-1 quadrangle, Montrose and Ouray Counties, Colorado},
  author = {C. H. Marshall},
  year = {1959},
  doi = {10.3133/i283},
  url = {https://pubs.usgs.gov/publication/i283},
  note = {Source identifier: i283}
}