@article{4722,
      author       = "Tscherning, C. C. and Geodaetisk Institut  and 1st
                      Hotine-Marussi Symposium on Mathematical Geodesy, Řím,
                      1985",
      title        = "Current Problems in Gravity Field Approximation  ",
      year         = "1985",
      note         = "Nestr., 3 obr., 5 tab., 1 sv.",
}