@misc{indiciae22deb57adf6f,
  title = {Comparison of the Cretaceous-Tertiary boundary impact events and the 0.77-Ma Australasian tektite event; relevance to mass extinction},
  author = {E.C. Chao},
  year = {1993},
  doi = {10.3133/b2050},
  url = {https://pubs.usgs.gov/publication/b2050},
  note = {Source identifier: b2050}
}