@article{27000,
      author       = "Ballarin, Silvio and 3. sjezd Mezinárodní gravimetrické
                      komise, Paříž, 15. - 19. září 1959",
      title        = "Relations for the condition and course of works for
                      reduction of gravimetric measures executed for the
                      construction of a gravimetric map of Italy  ",
      year         = "1959",
      note         = "1 sv.",
}