@book{
      international1970iaea,
      title={Fertilizer Management Practices for Maize: Results of Experiments With Isotopes},
      author={ },
      series={entity},
      number={121 },
      year={1970},
      isbn={92-0-115770-3 },
      url={/publications/1222/fertilizer-management-practices-for-maize-results-of-experiments-with-isotopes },
      publisher={INTERNATIONAL ATOMIC ENERGY AGENCY },
      address={Vienna}
    }