@misc{indiciae4e1bb345ebc9,
  title = {Geologic map of the Houston Gulch quadrangle, Gunnison and Saguache counties, Colorado},
  author = {Jerry Chipman Olson},
  year = {1976},
  doi = {10.3133/gq1287},
  url = {https://pubs.usgs.gov/publication/gq1287},
  note = {Source identifier: gq1287}
}