@misc{indiciae0c3fa4933e34,
  title = {Geology and mining industry of Leadville, Colorado, with atlas},
  author = {Samuel Franklin Emmons},
  year = {1886},
  doi = {10.3133/m12},
  url = {https://pubs.usgs.gov/publication/m12},
  note = {Source identifier: m12}
}