@misc{indiciae8bf6ddf2f90e,
  title = {Evolution of the Platoro caldera complex and related volcanic rocks, southeastern San Juan Mountains, Colorado},
  author = {Peter W. Lipman},
  year = {1975},
  doi = {10.3133/pp852},
  url = {https://pubs.usgs.gov/publication/pp852},
  note = {Source identifier: pp852}
}