@misc{1162901,
  author = {L M Cavallo and J M R Hutchinson and C N Smith and S C Anspach},
  title = {Standard Reference Materials:Half lives of materials used in the preparation of standard reference materials of nineteen radioactive nuclides issued by the National Bureau of Standards},
  year = {1965},
  month = {1965-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.SP.260-9},
  language = {en},
}