@misc{indiciaeff037b237c65,
  title = {Determination of nanogram amounts of bismuth in rocks by substoichiometric isotope dilution analysis},
  author = {L. Paul Greenland and E.Y. Campbell},
  year = {1972},
  doi = {10.1016/s0003-2670(01)81895-x},
  url = {https://pubs.usgs.gov/publication/70009753},
  note = {Source identifier: 70009753}
}