@misc{indiciae1fbf087010c8,
  title = {Guidebook of the western United States: Part C - The Santa Fe route, with a side trip to Grand Canyon of the Colorado},
  author = {Nelson Horatio Darton},
  year = {1916},
  doi = {10.3133/b613},
  url = {https://pubs.usgs.gov/publication/b613},
  note = {Source identifier: b613}
}