Spectra of 208Po and the hyperfine structure of 209Po.

@article{Charles1966SpectraO2,
  title={Spectra of 208Po and the hyperfine structure of 209Po.},
  author={G{\'e}rard Charles},
  journal={Journal of the Optical Society of America},
  year={1966},
  volume={56 10},
  pages={1291-7}
}