@misc{indiciaefa76cb78dadb,
  title = {Mineral resources of the American Flats Wilderness Study Area, Ouray and Hinsdale counties, Colorado},
  author = {Ken Hon and V. J. S. Grauch and D. J. Bove and B.J. Hannigan},
  year = {1987},
  doi = {10.3133/b1715a},
  url = {https://pubs.usgs.gov/publication/b1715A},
  note = {Source identifier: b1715A}
}