@misc{indiciae6821584f9025,
  title = {Hydrogeochemical investigations of historic mining districts, central western slope of Colorado, including influence on surface-water quality},
  author = {J. Thomas Nash},
  year = {2002},
  doi = {10.3133/ds73},
  url = {https://pubs.usgs.gov/publication/ds73},
  note = {Source identifier: ds73}
}