@misc{indiciaee6aab0875aba,
  title = {The determination of low levels of cobalt-60 in environmental waters by liquid scintillation counting},
  author = {H.C. Claassen},
  year = {1970},
  doi = {10.1016/s0003-2670(01)80953-3},
  url = {https://pubs.usgs.gov/publication/70010178},
  note = {Source identifier: 70010178}
}