@book{
      international1991iaea,
      title={Airborne Gamma Ray Spectrometer Surveying},
      author={ },
      series={entity},
      number={323 },
      year={1991},
      isbn={92-0-125291-9 },
      url={/publications/1427/airborne-gamma-ray-spectrometer-surveying },
      publisher={INTERNATIONAL ATOMIC ENERGY AGENCY },
      address={Vienna}
    }