Liquid Scintillation Counting of Plant Roots.

@article{Nissen1964LiquidSC,
  title={Liquid Scintillation Counting of Plant Roots.},
  author={P Nissen and Animals—eric Benson},
  journal={The International journal of applied radiation and isotopes},
  year={1964},
  volume={15},
  pages={505-7}
}