@misc{indiciae9dd3eecab3ac,
  title = {Preliminary geologic map of the Collbran Quadrangle, Mesa County, Colorado},
  author = {J. R. Donnell and W. E. Yeend and M. C. Smith},
  year = {1985},
  doi = {10.3133/mf1825},
  url = {https://pubs.usgs.gov/publication/mf1825},
  note = {Source identifier: mf1825}
}