@misc{indiciaea67a6d761988,
  title = {Organic geochemistry - A retrospective of its first 70 years},
  author = {K.A. Kvenvolden},
  year = {2006},
  doi = {10.1016/j.orggeochem.2005.09.001},
  url = {https://pubs.usgs.gov/publication/70030886},
  note = {Source identifier: 70030886}
}