@book{
      international2002iaea,
      title={Calibration of Photon and Beta Ray Sources Used in Brachytherapy},
      author={ },
      series={entity},
      number={1274 },
      year={2002},
      isbn={ },
      url={/publications/6474/calibration-of-photon-and-beta-ray-sources-used-in-brachytherapy },
      publisher={INTERNATIONAL ATOMIC ENERGY AGENCY },
      address={Vienna}
    }