@misc{indiciae30b797fb82ef,
  title = {Peneplains of the Front Range and Rocky Mountain National Park, Colorado},
  author = {Willis T. Lee},
  year = {1923},
  doi = {10.3133/b730a},
  url = {https://pubs.usgs.gov/publication/b730A},
  note = {Source identifier: b730A}
}