@misc{indiciaec20296d335fc,
  title = {Photogeologic map of the Lees Ferry SW quadrangle, Coconino County, Arizona},
  author = {J.S. Detterman},
  year = {1956},
  doi = {10.3133/i189},
  url = {https://pubs.usgs.gov/publication/i189},
  note = {Source identifier: i189}
}