@misc{indiciae9a62b086e3fa,
  title = {Selective preservation and origin of petroleum-forming aquatic kerogen},
  author = {Patrick G. Hatcher and E.C. Spiker and N.M. Szeverenyi and G.E. Maciel},
  year = {1983},
  doi = {10.1038/305498a0},
  url = {https://pubs.usgs.gov/publication/70011266},
  note = {Source identifier: 70011266}
}