@misc{indiciae2a8abc9c13a4,
  title = {[Seventh] Annual Report of the United States Geological and Geographical Survey of the Territories, embracing Colorado: being a report of progress of the exploration for the year 1873},
  author = {Ferdinand Vandeveer Hayden},
  year = {1874},
  doi = {10.3133/70038931},
  url = {https://pubs.usgs.gov/publication/70038931},
  note = {Source identifier: 70038931}
}