@misc{indiciae8d418dcfba07,
  title = {Preliminary report concerning explorations and surveys principally in Nevada and Arizona: Prosecuted in accordance with paragraph 2, special orders No. 109, War Department, March 18, 1871, from Brigadier General A.A. Humphreys, Chief of Engineers},
  author = {George Montague Wheeler},
  year = {1872},
  doi = {10.3133/70039936},
  url = {https://pubs.usgs.gov/publication/70039936},
  note = {Source identifier: 70039936}
}