@misc{indiciae57a898723394,
  title = {Mineral resource potential and geology of the San Juan National Forest, Colorado},
  author = {Richard E. Van Loenen and Anthony B. Gibbons and A. G. Raby and John S. Dersch},
  year = {1997},
  doi = {10.3133/b2127},
  url = {https://pubs.usgs.gov/publication/b2127},
  note = {Source identifier: b2127}
}