@misc{indiciae8a4876258782,
  title = {Preliminary geologic map of the Douglas Pass Quadrangle, Garfield County, Colorado},
  author = {V. F. Nuccio},
  year = {1985},
  doi = {10.3133/mf1772},
  url = {https://pubs.usgs.gov/publication/mf1772},
  note = {Source identifier: mf1772}
}