@misc{indiciae0703378e8a8a,
  title = {Mineral resource potential map of the West Needle Wilderness Study Area, San Juan and La Plata counties, Colorado},
  author = {R. E. Van Loenen and D.C. Scott},
  year = {1983},
  doi = {10.3133/mf1632a},
  url = {https://pubs.usgs.gov/publication/mf1632A},
  note = {Source identifier: mf1632A}
}