@misc{indiciae2c4da9b08f58,
  title = {Historic trail map of the Greater Denver area, Colorado},
  author = {G. R. Scott},
  year = {1976},
  doi = {10.3133/i856g},
  url = {https://pubs.usgs.gov/publication/i856G},
  note = {Source identifier: i856G}
}