@misc{indiciae137ffe121be7,
  title = {Geology and oil shale resources of the eastern side of the Piceance Creek Basin, Rio Blanco and Garfield counties, Colorado},
  author = {Donald Cave Duncan and Carl Belser},
  year = {1950},
  doi = {10.3133/ofr5012},
  url = {https://pubs.usgs.gov/publication/ofr5012},
  note = {Source identifier: ofr5012}
}