@misc{indiciaef54f2dd96bb0,
  title = {The Yampa coal field, Routt County, Colorado},
  author = {Nevin Melancthon Fenneman and Hoyt Stoddard Gale and Marius Robinson Campbell},
  year = {1906},
  doi = {10.3133/b297},
  url = {https://pubs.usgs.gov/publication/b297},
  note = {Source identifier: b297}
}