@article{20700,
      author       = "Fröhlich, Hans and Intercosmos Symposium on Results of
                      Satellite Observations, Budapest, October 21-25, 1974",
      title        = "Numerical and Analytical Methode for the Solution of
                      Surface Integrals Connected with the Simple Layer Model of
                      the Geopotential in Stellite Geodesy  ",
      year         = "1974",
      note         = "1 sv.",
}