@misc{indiciaece1f634a12c2,
  title = {Isotope-abundance variations and atomic weights of selected elements: 2016 (IUPAC Technical Report)},
  author = {Tyler B. Coplen and Yesha Shrestha},
  year = {2017},
  doi = {10.1515/pac-2016-0302},
  url = {https://pubs.usgs.gov/publication/70185750},
  note = {Source identifier: 70185750}
}