@misc{indiciae3e0731a85e2f,
  title = {Atomic weights of the elements 1999},
  author = {T.B. Coplen},
  year = {2009},
  doi = {10.1351/pac200173040667},
  url = {https://pubs.usgs.gov/publication/70023469},
  note = {Source identifier: 70023469}
}