@misc{indiciae8fd266fc53f2,
  title = {The stable isotopic composition of a phosphorite deposit: δ13C, δ34S, and δ18O},
  author = {David Z. Piper and Y. Kolodny},
  year = {1987},
  doi = {10.1016/0198-0149(87)90044-6},
  url = {https://pubs.usgs.gov/publication/70208054},
  note = {Source identifier: 70208054}
}