@book{
      international1996iaea,
      title={Manual on Mathematical Models in Isotope Hydrogeology},
      author={ },
      series={entity},
      number={910 },
      year={1996},
      isbn={ },
      url={/publications/5560/manual-on-mathematical-models-in-isotope-hydrogeology },
      publisher={INTERNATIONAL ATOMIC ENERGY AGENCY },
      address={Vienna}
    }