@misc{indiciaee80f3fe19dfd,
  title = {Correlation chart of Cretaceous and Paleocene rocks of the northern Great Plains},
  author = {Dudley D. Rice},
  year = {1976},
  doi = {10.3133/oc70},
  url = {https://pubs.usgs.gov/publication/oc70},
  note = {Source identifier: oc70}
}