@article{33845,
      author       = "Hopfield, H. S. and The Johns Hopkins University and
                      International Association of Geodesy  - Symposium on
                      Electromagnetic Distance Measurement and the Influence of
                      Atmospheric Refraction, Wageningen, Netherlands, 23 - 28 
                      May 1977 and International Association of Geodesy -
                      Symposium on Electromagnetic Distance Measurement and the
                      Influence of Atmospheric Refraction, Wageningen,
                      Netherlands, 23 - 28 May 1977",
      title        = "Tropospheric correction of electromagnetic ranging signals
                      to a satellite: Study of parameters  ",
      year         = "1977",
      note         = "6 obr., 2 tab., lit 5., 1 seš.",
}