@misc{indiciaef93ddb7cbd9b,
  title = {Revised preliminary geologic map of the Rifle Quadrangle, Garfield County, Colorado},
  author = {R. R. Shroba and R. B. Scott},
  year = {1997},
  doi = {10.3133/ofr97852},
  url = {https://pubs.usgs.gov/publication/ofr97852},
  note = {Source identifier: ofr97852}
}