@misc{indiciaed404973be3ff,
  title = {Distribution of oxygen and carbon isotopes in fossils of late cretaceous age, western interior region of North America},
  author = {H. A. Tourtelot and R.O. Rye},
  year = {1969},
  doi = {10.1130/0016-7606(1969)80[1903:dooaci]2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70207123},
  note = {Source identifier: 70207123}
}