@misc{148551,
  author = {Michael Unterweger and Dale Hoppes and Francis Schima and J Coursey},
  title = {Radionuclide Half-Life Measurements made at NIST (version 2.0)},
  year = {1999},
  month = {1999-01-01},
  publisher = {http://physics.nist.gov/Halflife},
  language = {en},
}