@misc{indiciae05ec660da2e2,
  title = {Guidebook of the western United States: Part A - The northern Pacific route, with a side trip to Yellowstone Park},
  author = {Marius R. Campbell},
  year = {1915},
  doi = {10.3133/b611},
  url = {https://pubs.usgs.gov/publication/b611},
  note = {Source identifier: b611}
}