@misc{indiciae311b7e9a9fe6,
  title = {Isotopic evidence from the eastern Canadian shield for geochemical discontinuity in the proterozoic mantle},
  author = {L.D. Ashwal and J. L. Wooden},
  year = {1983},
  doi = {10.1038/306679a0},
  url = {https://pubs.usgs.gov/publication/70012067},
  note = {Source identifier: 70012067}
}