@misc{indiciaef8a244e440fe,
  title = {Geochemical data for historic mining areas, central western slope, Colorado},
  author = {J. Thomas Nash and Warren C. Day and Anna B. Wilson},
  year = {2001},
  doi = {10.3133/ofr013},
  url = {https://pubs.usgs.gov/publication/ofr013},
  note = {Source identifier: ofr013}
}