@misc{indiciae9a7cb2736690,
  title = {Reconnaissance of the Book Cliffs coal field, between Grand River, Colorado and Sunnyside, Utah},
  author = {G. B. Richardson},
  year = {1909},
  doi = {10.3133/b371},
  url = {https://pubs.usgs.gov/publication/b371},
  note = {Source identifier: b371}
}