@misc{indiciae28b28a70e014,
  title = {Geology and chemical analyses of coal, Mesaverde Group (Cretaceous), lower White River coal field, Moffat and Rio Blanco counties, Colorado},
  author = {R.T. Hildebrand and R.S. Garrigues},
  year = {1981},
  doi = {10.3133/ofr81597},
  url = {https://pubs.usgs.gov/publication/ofr81597},
  note = {Source identifier: ofr81597}
}