@misc{indiciae3c7456125da3,
  title = {Historic trail map of the Leadville 1° x 2° quadrangle, central Colorado},
  author = {Glenn R. Scott},
  year = {2004},
  doi = {10.3133/sim2820},
  url = {https://pubs.usgs.gov/publication/sim2820},
  note = {Source identifier: sim2820}
}