@misc{indiciae50e037c533a5,
  title = {Determination of δ13C, δ15N, or δ34S by isotope-ratio-monitoring mass spectrometry using an elemental analyzer},
  author = {Craig A. Johnson and Craig A. Stricker and Cayce A. Gulbransen and Matthew P. Emmons},
  year = {2018},
  doi = {10.3133/tm5d4},
  url = {https://pubs.usgs.gov/publication/tm5D4},
  note = {Source identifier: tm5D4}
}