@book{
      international1994iaea,
      title={Mathematical Models and their Applications to Isotope Studies in Groundwater Hydrology},
      author={ },
      series={entity},
      number={777 },
      year={1994},
      isbn={ },
      url={/publications/5422/mathematical-models-and-their-applications-to-isotope-studies-in-groundwater-hydrology },
      publisher={INTERNATIONAL ATOMIC ENERGY AGENCY },
      address={Vienna}
    }