@misc{indiciae5e44ac2672d0,
  title = {Collected papers from the sixth annual meeting of the society for organic petrology},
  author = {R.D. Harvey and J.C. Crelling and D.D. Kaegi},
  year = {1991},
  url = {https://pubs.usgs.gov/publication/70015048},
  note = {Source identifier: 70015048}
}