@book{
      international1976iaea,
      title={Tracer Manual on Crops and Soils},
      author={ },
      series={entity},
      number={171 },
      year={1976},
      isbn={92-0-115076-8 },
      url={/publications/1272/tracer-manual-on-crops-and-soils },
      publisher={INTERNATIONAL ATOMIC ENERGY AGENCY },
      address={Vienna}
    }