@misc{indiciae25878c4776cc,
  title = {Isotopic equilibrium between shells and their environement.},
  author = {W G Mook and J C Vogel},
  year = {1968},
  doi = {10.1126/science.159.3817.874},
  url = {https://pubmed.ncbi.nlm.nih.gov/5636327/},
  note = {Source identifier: 5636327}
}