@misc{indiciaebe053fa8868e,
  title = {Photogeologic map of the Fredonia NE quadrangle, Coconino and Mohave Counties, Arizona},
  author = {R. H. Morris},
  year = {1957},
  doi = {10.3133/i247},
  url = {https://pubs.usgs.gov/publication/i247},
  note = {Source identifier: i247}
}