@misc{indiciaeb1be83be9e39,
  title = {Geology of Naval Oil Shale Reserves 1 and 3, Garfield County, Colorado},
  author = {D.C. Duncan and N.M. Denson},
  year = {1949},
  doi = {10.3133/om94},
  url = {https://pubs.usgs.gov/publication/om94},
  note = {Source identifier: om94}
}