@misc{indiciae3d3bda10308e,
  title = {Report of the survey of the Colorado of the West: Letter from the Secretary of the Smithsonian Institution, transmitting a report of the survey of the Colorado of the West and its tributaries},
  author = {John Wesley Powell},
  year = {1873},
  doi = {10.3133/70039909},
  url = {https://pubs.usgs.gov/publication/70039909},
  note = {Source identifier: 70039909}
}