@misc{indiciaed324e17e8a2e,
  title = {Vertebrate biostratigraphy of the Hell Creek Formation in southwestern North Dakota and northwestern South Dakota},
  author = {Dean Pearson and Terry Schaeffer and Kirk R. Johnson and Douglas J. Nichols and John P. Hunter},
  year = {2002},
  doi = {10.1130/0-8137-2361-2.145},
  url = {https://pubs.usgs.gov/publication/70221502},
  note = {Source identifier: 70221502}
}