@article{221,
      author       = "Dinter, Georg and Illner, Michael and Jäger, Reiner and
                      Univ. - Geod. Inst. Karlsruhe and IAG - EUREF, Anakara, May
                      22 - 25, 1996",
      title        = "A Concept for the Combination of GPS, Terrestrial Height
                      Data and Geoid - Models and for a Geoid - Refinement in
                      Arbitrary Large Areas - Theory, Software and Real Data
                      Experiences of an Approach proposed for the European
                      Vertical Datum  ",
      year         = "1996",
      note         = "Obr. a tab. v textu. - Liter. - 1 sv.",
}