@misc{indiciae97213a99e23f,
  title = {Geologic map of the Snowmass Mountain quadrangle, Gunnison and Pitkin Counties, Colorado},
  author = {Felix E. Mutschler},
  year = {1969},
  doi = {10.3133/ofr69180},
  url = {https://pubs.usgs.gov/publication/ofr69180},
  note = {Source identifier: ofr69180}
}