@misc{indiciae234e4c315b70,
  title = {Geologic map and sections of the Holy Cross quadrangle, Eagle, Lake, Pitkin, and Summit Counties, Colorado},
  author = {Ogden Tweto and Theodore R. Brandt},
  year = {1974},
  doi = {10.3133/i830},
  url = {https://pubs.usgs.gov/publication/i830},
  note = {Source identifier: i830}
}