@book{
      international1968iaea,
      title={Isotopes and Radiation in Soil Organic Matter Studies (Vienna, 15-19 July 1968)},
      author={ },
      series={entity},
      number={ },
      year={1968},
      isbn={92-0-010368-5 },
      url={/publications/2150/isotopes-and-radiation-in-soil-organic-matter-studies-vienna-15-19-july-1968 },
      publisher={INTERNATIONAL ATOMIC ENERGY AGENCY },
      address={Vienna}
    }