@misc{indiciae57ee584a06c9,
  title = {Thickness, oil-yield, and kriged resource estimates for the Eocene Green River formation, Piceance Creek basin, Colorado},
  author = {Janet K. Pitman and Frances Wahl Pierce and W.D. Grundy},
  year = {1990},
  doi = {10.3133/oc132},
  url = {https://pubs.usgs.gov/publication/oc132},
  note = {Source identifier: oc132}
}