@misc{indiciae86bbee354d5e,
  title = {Geographical and Topographical Atlas accompanying the report of the Geological Exploration of the Fortieth Parallel, made by authority of the Hornorable Secretary of War, under the direction of Brig. and Bvt. Major General A. A. Humphreys, Chief of Engineers},
  author = {Clarence King and Julius Bien},
  year = {1876},
  doi = {10.3133/70039901},
  url = {https://pubs.usgs.gov/publication/70039901},
  note = {Source identifier: 70039901}
}