@article{21359,
      author       = "Ilk, Karl Heinz and Inst. für Astron. und Phys. Geodäsie 
                      and 1st Hotine-Marussi Symposium on Mathematical Geodesy,
                      Řím, 1985",
      title        = "On the Regional Mapping of Gravitation with two Satellites 
                      ",
      year         = "1985",
      note         = "14 obr., 1 tab., 1 sv.",
}