@book{
      international1969iaea,
      title={IAEA Laboratory Activities - Sixth Report (1969)},
      author={ },
      series={entity},
      number={98 },
      year={1969},
      isbn={92-0-175169-9 },
      url={/publications/1197/iaea-laboratory-activities-sixth-report-1969 },
      publisher={INTERNATIONAL ATOMIC ENERGY AGENCY },
      address={Vienna}
    }