@article{26519,
      author       = "Dir. de la Geod. et du Nivell and 19. IUGG - Vancouver,
                      August 9-22, 1987",
      title        = "Rapport National Tunisie. 1982 - 1986  ",
      year         = "1987",
      note         = "Liter., 1 dvojlist",
}