@book{
      international1966iaea,
      title={Radioisotope Instruments in Industry and Geophysics},
      author={ },
      series={entity},
      number={20 },
      year={1966},
      isbn={92-0-164066-8 },
      url={/publications/1536/radioisotope-instruments-in-industry-and-geophysics },
      publisher={INTERNATIONAL ATOMIC ENERGY AGENCY },
      address={Vienna}
    }