@misc{indiciae9c18a3e3d160,
  title = {Proceedings of the twentieth annual meeting of the Society for Organic Petrology},
  year = {2004},
  doi = {10.3133/ofr20041283},
  url = {https://pubs.usgs.gov/publication/ofr20041283},
  note = {Source identifier: ofr20041283}
}