@article{1968,
      author       = "Moritz, Helmut and Sünkel, Hans and International Summer
                      School in the Mountains on Mathematical Methods in Physical
                      Geodesy Ramsau, Austria, August 23 to September 2, 1977",
      title        = "Approximation Methods in Geodesy  ",
      year         = "1978",
      note         = "Obr., tab., grafy, bibliogr. v textu., 1 sv.",
}