@misc{indiciae145aba7deaae,
  title = {Supplementary modification and introduction of code numbers to the low-latitude coccolith biostratigraphic zonation (Bukry, 1973; 1975)},
  author = {H. Okada and D. Bukry},
  year = {1980},
  doi = {10.1016/0377-8398(80)90016-x},
  url = {https://pubs.usgs.gov/publication/70012334},
  note = {Source identifier: 70012334}
}