@book{
      international1969iaea,
      title={Contemporary Physics, Trieste Symposium 1968 (Trieste, 7-28 June 1968)},
      author={ },
      series={entity},
      number={ },
      year={1969},
      isbn={92-0-130169-3 },
      url={/publications/2188/contemporary-physics-trieste-symposium-1968-trieste-7-28-june-1968 },
      publisher={INTERNATIONAL ATOMIC ENERGY AGENCY },
      address={Vienna}
    }