@misc{indiciae38a1b2f59747,
  title = {Second Annual report of the United States Geological Survey to the Secretary of the Interior, 1880-1881},
  author = {J. W. Powell},
  year = {1882},
  doi = {10.3133/ar2},
  url = {https://pubs.usgs.gov/publication/ar2},
  note = {Source identifier: ar2}
}