@article{22085,
  author = {Lev S Ruzer and Richard G Sextro},
  title = {Assessment of Very Low Aerosol Concentrations by Measuring the Unattached Fraction of 218Po},
  year = {1997},
  journal = {Radiation Protection Dosimetry},
  volume = {71},
  pages = {135-140},
  language = {eng},
}