@misc{indiciae0a6670df3548,
  title = {Evidence for a single impact at the Cretaceous-Tertiary boundary from trace elements},
  author = {Gilmour, Iain and Anders, Edward},
  year = {1988},
  url = {https://ntrs.nasa.gov/citations/19890011948},
  note = {Source identifier: 19890011948}
}