@misc{indiciae6424c43565f2,
  title = {Geochemical investigations of some black shales and associated rocks},
  author = {James David Vine and Elizabeth B. Tourtelot},
  year = {1969},
  doi = {10.3133/b1314a},
  url = {https://pubs.usgs.gov/publication/b1314A},
  note = {Source identifier: b1314A}
}