@book{ international1969iaea, title={Environmental Contamination by Radioactive Materials (Vienna, 24-28 March 1969)}, series={Proceedings Series}, year={1969}, isbn={92-0-020169-5}, url={http://www.dgdingfa.net/publications/2200/environmental-contamination-by-radioactive-materials-vienna-24-28-march-1969}, publisher={INTERNATIONAL ATOMIC ENERGY AGENCY}, address={Vienna} }
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