@misc{indiciaeb5af9f6d32cf,
  title = {Geology and ore deposits of the Creede district, Colorado},
  author = {William H. Emmons and Esper S. Larsen},
  year = {1923},
  doi = {10.3133/b718},
  url = {https://pubs.usgs.gov/publication/b718},
  note = {Source identifier: b718}
}