@misc{indiciaed996ee61f58b,
  title = {Report upon United States geological surveys west of the one hundredth meridian, Volume II: Astronomy and barometric hypsometry},
  author = {George Montague Wheeler},
  year = {1877},
  doi = {10.3133/70039246},
  url = {https://pubs.usgs.gov/publication/70039246},
  note = {Source identifier: 70039246}
}