@misc{indiciae99442c1242a3,
  title = {Geologic map of the lower Cache La Poudre River basin, north-central Colorado},
  author = {L.A. Hershey and P. A. Schneider},
  year = {1972},
  doi = {10.3133/i687},
  url = {https://pubs.usgs.gov/publication/i687},
  note = {Source identifier: i687}
}