@misc{indiciae931b71c3a609,
  title = {Geologic map of the Rulison quadrangle, Garfield County, Colorado},
  author = {Warren E. Yeend and John R. Donnell},
  year = {1968},
  doi = {10.3133/ofr68335},
  url = {https://pubs.usgs.gov/publication/ofr68335},
  note = {Source identifier: ofr68335}
}