@misc{indiciae831112e07b93,
  title = {Geology of the central Roan Plateau area, northwestern Colorado},
  author = {William J. Hail},
  year = {1992},
  doi = {10.3133/b1787r},
  url = {https://pubs.usgs.gov/publication/b1787R},
  note = {Source identifier: b1787R}
}