@book{
      international1990iaea,
      title={The Use of Gamma Ray Data to Define the Natural Radiation Environment},
      author={ },
      series={entity},
      number={566 },
      year={1990},
      isbn={ },
      url={/publications/822/the-use-of-gamma-ray-data-to-define-the-natural-radiation-environment },
      publisher={INTERNATIONAL ATOMIC ENERGY AGENCY },
      address={Vienna}
    }