@misc{indiciaec12d669256f6,
  title = {Geologic map of the Hayden Peak quadrangle, Pitkin and Gunnison Counties, Colorado},
  author = {Bruce Bryant},
  year = {1970},
  doi = {10.3133/gq863},
  url = {https://pubs.usgs.gov/publication/gq863},
  note = {Source identifier: gq863}
}