@misc{indiciae1bd9eb545214,
  title = {Chart showing intertongued units of the Eocene Green River and Uinta Formations, northwestern Piceance Creek basin, northwestern Colorado},
  author = {W. J. Hail},
  year = {1987},
  doi = {10.3133/i1797b},
  url = {https://pubs.usgs.gov/publication/i1797B},
  note = {Source identifier: i1797B}
}