@misc{indiciaec5c6ec6fdccf,
  title = {Silverton folio, Colorado},
  author = {Whitman Cross and Ernest Howe and F. L. Ransome},
  year = {1905},
  doi = {10.3133/gf120},
  url = {https://pubs.usgs.gov/publication/gf120},
  note = {Source identifier: gf120}
}