@misc{indiciaed867e5940141,
  title = {Quantitative determination of tritium in natural waters},
  author = {C.M. Hoffman and G.L. Stewart},
  year = {1966},
  doi = {10.3133/wsp1696d},
  url = {https://pubs.usgs.gov/publication/wsp1696D},
  note = {Source identifier: wsp1696D}
}