@misc{indiciae0814a3f983ed,
  title = {Petrified peat from a Permian coal bed in Antarctica},
  author = {J. M. Schopf},
  year = {1970},
  doi = {10.1126/science.169.3942.274},
  url = {https://pubs.usgs.gov/publication/70010167},
  note = {Source identifier: 70010167}
}