@book{
      international1976iaea,
      title={Tracer Studies on Non-protein Nitrogen for Ruminants III},
      author={ },
      series={entity},
      number={ },
      year={1976},
      isbn={92-0-111376-5 },
      url={/publications/3254/tracer-studies-on-non-protein-nitrogen-for-ruminants-iii },
      publisher={INTERNATIONAL ATOMIC ENERGY AGENCY },
      address={Vienna}
    }