@misc{indiciae01db7f468c4a,
  title = {Geologic map of the northern part of the Piceance Creek basin, northwestern Colorado},
  author = {W. J. Hail and M. C. Smith},
  year = {1994},
  doi = {10.3133/i2400},
  url = {https://pubs.usgs.gov/publication/i2400},
  note = {Source identifier: i2400}
}