@misc{indiciae22849cbce871,
  title = {Mineral resources of the Chama-southern San Juan Mountains Wilderness Study Area, Mineral, Rio Grande, Archuleta, and Conejos counties, Colorado},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1977},
  doi = {10.3133/ofr77309},
  url = {https://pubs.usgs.gov/publication/ofr77309},
  note = {Source identifier: ofr77309}
}