@misc{indiciae64ec164e158f,
  title = {Clarification of the term “normal material” used for standard atomic weights (IUPAC Technical Report)},
  author = {Tyler B. Coplen and Norman E. Holden and Michael E. Wieser and J.K. Bohlke},
  year = {2018},
  doi = {10.1515/pac-2017-0301},
  url = {https://pubs.usgs.gov/publication/70202182},
  note = {Source identifier: 70202182}
}