@book{
      international2021iaea,
      title={Application of a Graded Approach in Regulating the Safety of Radiation Sources},
      author={ },
      series={entity},
      number={1974 },
      year={2021},
      isbn={978-92-0-127421-2 },
      url={/publications/14908/application-of-a-graded-approach-in-regulating-the-safety-of-radiation-sources },
      publisher={INTERNATIONAL ATOMIC ENERGY AGENCY },
      address={Vienna}
    }