@misc{indiciae2b5d56b25b7d,
  title = {Rhenium-osmium isotope systematics of carbonaceous chondrites},
  author = {R.J. Walker and J. W. Morgan},
  year = {1989},
  doi = {10.1126/science.243.4890.519},
  url = {https://pubs.usgs.gov/publication/70016014},
  note = {Source identifier: 70016014}
}