@book{
      international1988iaea,
      title={Principles for the Exemption of Radiation Sources and Practices from Regulatory Control},
      author={ },
      series={entity},
      number={89 },
      year={1988},
      isbn={92-0-123888-6 },
      url={/publications/3686/principles-for-the-exemption-of-radiation-sources-and-practices-from-regulatory-control },
      publisher={INTERNATIONAL ATOMIC ENERGY AGENCY },
      address={Vienna}
    }