@misc{indiciae2a3868684446,
  title = {Selenium isotope analysis},
  author = {C.L. Webster and C. G. Warren},
  year = {1982},
  doi = {10.3133/ofr81992},
  url = {https://pubs.usgs.gov/publication/ofr81992},
  note = {Source identifier: ofr81992}
}