@misc{indiciaef353258ccbb6,
  title = {Geology and ore deposits of the Summitville district, San Juan Mountains, Colorado},
  author = {Thomas August Steven and James Clifford Ratte},
  year = {1960},
  doi = {10.3133/pp343},
  url = {https://pubs.usgs.gov/publication/pp343},
  note = {Source identifier: pp343}
}