@misc{indiciae5a420c99a53a,
  title = {Geology of the eastern part of the Piceance Creek basin, Rio Blanco and Garfield Counties, Colorado},
  author = {D.C. Duncan and Carl Belser},
  year = {1950},
  doi = {10.3133/om119},
  url = {https://pubs.usgs.gov/publication/om119},
  note = {Source identifier: om119}
}