@misc{indiciae31a5abb01049,
  title = {Precambrian to earliest Mississippian stratigraphy, geologic history, and paleogeography of northwestern Colorado and west-central Colorado},
  author = {James M. Soule},
  year = {1992},
  doi = {10.3133/b1787u},
  url = {https://pubs.usgs.gov/publication/b1787U},
  note = {Source identifier: b1787U}
}