@misc{indiciae3fa93eb3b5cc,
  title = {Pyrite discs in coal: evidence for fossilized bacterial colonies},
  author = {G. Southam and R. Donald and A. Rostad and C. Brock},
  year = {2001},
  doi = {10.1130/0091-7613(2001)029<0047:pdicef>2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70023583},
  note = {Source identifier: 70023583}
}