@misc{indiciae97349e7e39a1,
  title = {Geological significance of coccoliths in fine-grained carbonate bands of postglacial Black Sea sediments},
  author = {David Bukry and Stanley A. King and Michael K. Horn and Frank T. Manheim},
  year = {1970},
  doi = {10.1038/226156a0},
  url = {https://pubs.usgs.gov/publication/70206929},
  note = {Source identifier: 70206929}
}