@misc{indiciaed8823c2e1ad9,
  title = {Reappraisal of three calcareous nannofossil species: Coccolithus crassus, Toweius magnicrassus, and Toweius callosus},
  author = {Wuchang Wei and L. Liu and David Bukry},
  year = {1993},
  doi = {10.1144/jm.12.1.91},
  url = {https://pubs.usgs.gov/publication/70208655},
  note = {Source identifier: 70208655}
}