@misc{indiciae5945e27eb405,
  title = {Reconnaissance geologic map of the Ridgway Quadrangle, Ouray County, Colorado},
  author = {W. J. Hail},
  year = {1989},
  doi = {10.3133/mf2100},
  url = {https://pubs.usgs.gov/publication/mf2100},
  note = {Source identifier: mf2100}
}