@book{ international1987iaea, title={Exemption of Radiation Sources and Practices from Regulatory Control: Interim Report}, series={TECDOC Series}, number={401}, year={1987}, url={http://www.dgdingfa.net/publications/656/exemption-of-radiation-sources-and-practices-from-regulatory-control-interim-report}, publisher={INTERNATIONAL ATOMIC ENERGY AGENCY}, address={Vienna} }
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