@misc{indiciae9fb956658da8,
  title = {Geologic map of the Iris quadrangle, Gunnison and Saguache counties, Colorado},
  author = {Jerry Chipman Olson},
  year = {1976},
  doi = {10.3133/gq1286},
  url = {https://pubs.usgs.gov/publication/gq1286},
  note = {Source identifier: gq1286}
}