@misc{indiciaef29bbebc11fd,
  title = {Preliminary geologic map of the Horse Mountain Quadrangle, Garfield County, Colorado},
  author = {G. M. Fairer and M. W. Green and R. R. Shroba},
  year = {1993},
  doi = {10.3133/ofr93699},
  url = {https://pubs.usgs.gov/publication/ofr93699},
  note = {Source identifier: ofr93699}
}