@misc{indiciae0306c2a94ed3,
  title = {Geology and geochemistry of Summitville, Colorado: An epithermal acid sulfate deposit in a volcanic dome},
  author = {J. E. Gray and M.F. Coolbaugh},
  year = {1994},
  doi = {10.2113/gsecongeo.89.8.1906},
  url = {https://pubs.usgs.gov/publication/70016742},
  note = {Source identifier: 70016742}
}