@article{11959,
      author       = "Rapp, Richard H. and Ohio State University Columbus and 19.
                      IUGG - Vancouver, Aug. 9-22, 1987",
      title        = "Gravitational Potential Coefficient Models Developments and
                      Comparison  ",
      year         = "1987",
      note         = "Tab. a obr. v textu. - Liter., 1 sv.",
}