@misc{indiciae3469e64eb075,
  title = {Mass mortality and extraterrestrial impacts},
  author = {Jansa, L. F. and Gradstein, F. M. and Pierre-Aubry, M.},
  year = {1988},
  url = {https://ntrs.nasa.gov/citations/19890011964},
  note = {Source identifier: 19890011964}
}