@misc{indiciae732d42def7e8,
  title = {Observations on the mass-extinction debates},
  author = {William Glen},
  year = {1996},
  doi = {10.1130/0-8137-2307-8.39},
  url = {https://pubs.usgs.gov/publication/70246758},
  note = {Source identifier: 70246758}
}