@misc{indiciae3114232052ed,
  title = {Comparison of 14C ages of hydrothermal petroleums},
  author = {Bernd R. T. Simoneit and Keith A. Kvenvolden},
  year = {1994},
  doi = {10.1016/0146-6380(94)90103-1},
  url = {https://pubs.usgs.gov/publication/70016960},
  note = {Source identifier: 70016960}
}