@misc{indiciaedbf15c5c672a,
  title = {Tritium and deuterium content of atmospheric hydrogen},
  author = {F. Begemann and Irving Friedman},
  year = {2014},
  doi = {10.1515/zna-1959-1204},
  url = {https://pubs.usgs.gov/publication/70211565},
  note = {Source identifier: 70211565}
}