@misc{indiciae668db736de4b,
  title = {Calcium carbonate, organic carbon, and nitrogen in sediments from drill holes on the continental margin off Florida},
  author = {Jobst Hulsemann},
  year = {1968},
  doi = {10.3133/pp581b},
  url = {https://pubs.usgs.gov/publication/pp581B},
  note = {Source identifier: pp581B}
}