@article{19539,
      author       = "XII General Assembly of International Union of Geodesy and
                      Geophysics - Helsinki 1960",
      title        = "National Report on Geodesy to 1960. Submitted to the
                      Association of Geodesy at Helsinki  ",
      year         = "1960",
      note         = "1 sv., 3 map. příl., International Union of Geodesy and
                      Geophysics. The Republik of the Sudan",
}