@article{11978,
      author       = "Dufour, Henri Marcel and XVIIIe Assemblée générale de
                      l´U.G.G.I. Hambourg - Aout 1983",
      title        = "Gravity Field Representation. Report of S.S.G. 4.58. XVIIIe
                      Assemblée générale de l´U.G.G.I. Hambourg - Aout 1983  ",
      year         = "1983",
      note         = "1 sv.",
}