@article{16383,
      author       = "Reigberg, Christoph and DGFI and Inter. Summer School of
                      Theor. Geodesy. Assisi, 23.5-3.6.1988",
      title        = "Lecture Notes on Gravity Field Recovery from Satellite
                      Tracking Data  ",
      year         = "1988",
      note         = "Obr. a tab. v textu. - Liter., 1 sv.",
}