@misc{indiciaef1d4b95d8ee4,
  title = {Trace element patterns at a non-marine cretaceous-tertiary boundary},
  author = {J. S. Gilmore and J.D. Knight and C. J. Orth and C. L. Pillmore and R.H. Tschudy},
  year = {1984},
  doi = {10.1038/307224a0},
  url = {https://pubs.usgs.gov/publication/70013392},
  note = {Source identifier: 70013392}
}