@article{4225,
      author       = "Tscherning, C. C. and Rapp, Richard H.",
      title        = "Closed Covariance expressions for Gravity Anomalies Geoid
                      Undulations, and Deflections of the Vertical Impliet by
                      Anomaly Degree Variance Models  ",
      year         = "1974",
      note         = "Obr. a tab. v textu. - Lit. - Sum. - Příl.: výsl. poč.,
                      May 1974, 1 sv.",
}