@book{
      international1976iaea,
      title={Radioactive Tracer Techniques for the Study of Gastrointestinal Absorption (Vienna, 16-20 July 1973)},
      author={ },
      series={entity},
      number={188 },
      year={1976},
      isbn={ },
      url={/publications/436/radioactive-tracer-techniques-for-the-study-of-gastrointestinal-absorption-vienna-16-20-july-1973 },
      publisher={INTERNATIONAL ATOMIC ENERGY AGENCY },
      address={Vienna}
    }