@book{
      international1969iaea,
      title={Reactivity Measurements (Vienna, 9-13 Dec. 1968)},
      author={ },
      series={entity},
      number={108 },
      year={1969},
      isbn={ },
      url={/publications/349/reactivity-measurements-vienna-9-13-dec-1968 },
      publisher={INTERNATIONAL ATOMIC ENERGY AGENCY },
      address={Vienna}
    }