@article{38135,
      author       = "Scherrer, René and Wild Heerbrugg and Internat. summer
                      school of Theor. Geodesy. Asissi, 23.5 - 3.6. 1988",
      title        = "The WM GPS Primer  ",
      year         = "1988",
      note         = "Obr., tab., liter. - Příl.: GPS in general., Geodetic
                      background, 1 sv.",
}