@misc{indiciaebe11fcf7e421,
  title = {Geologic Map of the Sulphur Mountain Quadrangle, Park County, Colorado},
  author = {Robert G. Bohannon and Chester A. Ruleman},
  year = {2009},
  doi = {10.3133/sim3082},
  url = {https://pubs.usgs.gov/publication/sim3082},
  note = {Source identifier: sim3082}
}