@misc{indiciae9d4ca7902711,
  title = {Photogeologic map of the Fredonia SW quadrangle, Mohave County, Arizona},
  author = {C. H. Marshall},
  year = {1956},
  doi = {10.3133/i160},
  url = {https://pubs.usgs.gov/publication/i160},
  note = {Source identifier: i160}
}