@misc{indiciaee4c0c96cf2ab,
  title = {Ash flows and related volcanic rocks associated with the Creede Caldera, San Juan Mountains, Colorado},
  author = {J.C. Ratte and T. A. Steven},
  year = {1967},
  doi = {10.3133/pp524h},
  url = {https://pubs.usgs.gov/publication/pp524H},
  note = {Source identifier: pp524H}
}