@misc{indiciae3bab7eb80394,
  title = {USGS44, a new high-purity calcium carbonate reference material for δ13C measurements},
  author = {Haiping Qi and Heiko Moossen and Harro A.J. Meijer and Tyler B. Coplen and Anita T Aerts-Bijma and Lauren T Reid and Heiko Geilmann and Jurgen Richter and Michael Rothe and Willi A. Brand and Blaza Toman and Jacqueline Benefield and Jean-Francois Helie},
  year = {2021},
  doi = {10.1002/rcm.9006},
  url = {https://pubs.usgs.gov/publication/70221491},
  note = {Source identifier: 70221491}
}