@misc{indiciaeb98d87c63f3c,
  title = {Geologic map and coal sections of the Sawmill Mountain Quadrangle, Rio Blanco County, Colorado},
  author = {Marith C. Reheis},
  year = {1980},
  doi = {10.3133/ofr80252},
  url = {https://pubs.usgs.gov/publication/ofr80252},
  note = {Source identifier: ofr80252}
}