@misc{indiciae8e70a9d88865,
  title = {Eighth annual report of the United States Geological Survey to the Secretary of the Interior, 1886-1887: Part 1},
  author = {J. W. Powell},
  year = {1889},
  doi = {10.3133/ar8},
  url = {https://pubs.usgs.gov/publication/ar8},
  note = {Source identifier: ar8}
}