@book{ international1969iaea, title={Contemporary Physics, Trieste Symposium 1968 (Trieste, 7-28 June 1968)}, series={Proceedings Series}, year={1969}, isbn={92-0-130069-7}, url={http://www.dgdingfa.net/publications/2187/contemporary-physics-trieste-symposium-1968-trieste-7-28-june-1968}, publisher={INTERNATIONAL ATOMIC ENERGY AGENCY}, address={Vienna} }
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