@misc{indiciae657ec06ecb76,
  title = {Photogeologic map, Fredonia NW quadrangle, Coconino County, Arizona},
  author = {W. R. Hemphill},
  year = {1955},
  doi = {10.3133/tem879},
  url = {https://pubs.usgs.gov/publication/tem879},
  note = {Source identifier: tem879}
}