@misc{indiciae3b607d1935dd,
  title = {Photogeologic map of the Jacob Lake NE quadrangle, Coconino County, Arizona},
  author = {C. H. Marshall},
  year = {1956},
  doi = {10.3133/i194},
  url = {https://pubs.usgs.gov/publication/i194},
  note = {Source identifier: i194}
}