@article{19501,
      author       = "Torres, Joao Agria and Inst. Portug. Cartogr. e Cadast. and
                      IAG - EUREF, Anakara, May 22 - 25, 1996",
      title        = "National Report of Portugal  ",
      year         = "1996",
      note         = "2 obr. - 1 sv.",
}