@book{ international1998iaea, title={Safety of Radiation Sources and Security of Radioactive Materials Contributed papers}, series={TECDOC Series}, number={1045}, year={1998}, url={http://www.dgdingfa.net/publications/5342/safety-of-radiation-sources-and-security-of-radioactive-materials-contributed-papers}, publisher={INTERNATIONAL ATOMIC ENERGY AGENCY}, address={Vienna} }
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