@misc{indiciae295370cb5bcf,
  title = {Geologic map of the Sawtooth Mountain Quadrangle, Saguache County, Colorado},
  author = {J. C. Olson and T. A. Steven},
  year = {1976},
  doi = {10.3133/mf733},
  url = {https://pubs.usgs.gov/publication/mf733},
  note = {Source identifier: mf733}
}