@misc{indiciae2dfb6591416e,
  title = {Geochemical maps of copper, lead, and zinc, upper Arkansas River drainage basin, Colorado},
  author = {S. M. Smith},
  year = {1994},
  doi = {10.3133/ofr94408},
  url = {https://pubs.usgs.gov/publication/ofr94408},
  note = {Source identifier: ofr94408}
}