@article{30049,
      author       = "IUGG XX General Assembly IAG, Vienna, August 11-24, 1991",
      title        = "South African Report to the 20th General Assembly of the
                      IUGG in Vienna, Austria from 11 to 24 August 1991. Report to
                      the International Association of Geodesy (IAG)  ",
      year         = "1991",
      note         = "Liter. - Obr. v příl.",
}