@article{5916,
      author       = "Nuńez, A. and Sevilla, M.J. and Agria, J.M. and
                      6.Nár.sem. geod. a geofyz. Madrid, 1988",
      title        = "Determinacion astrogeodesca del geoide on Portugal  ",
      year         = "1988",
      note         = "Obr. a tab. - Liter. - Res",
}