@misc{indiciaefd856bd647e5,
  title = {Oxygen isotopes in nitrate: New reference materials for 18O:17O:16O measurements and observations on nitrate-water equilibration},
  author = {J.K. Böhlke and S.J. Mroczkowski and T.B. Coplen},
  year = {2003},
  doi = {10.1002/rcm.1123},
  url = {https://pubs.usgs.gov/publication/70025139},
  note = {Source identifier: 70025139}
}