@article{15618,
      author       = "Hirvonen, R. A. and XII. General Assembly, International
                      Union of Geodesy and Geophysics, Helsinki, Finland - July -
                      August 1960",
      title        = "Koordinatenberechnungen auf dem Ellipsoide ohne Hilfstafeln
                       ",
      year         = "1960",
      note         = "1 sv.",
}