@misc{indiciae8609073d3d45,
  title = {Stratigraphic nomenclature of the Thirtynine Mile volcanic field, central Colorado},
  author = {Rudy C. Epis and Charles Edward Chapin},
  year = {1974},
  doi = {10.3133/b1395c},
  url = {https://pubs.usgs.gov/publication/b1395C},
  note = {Source identifier: b1395C}
}