@article{8938,
      author       = "Adam, J. and Gurtner, W. and Harsson, B. G. and IAG Sci.
                      Assem., Rio de Janeiro, 1997",
      title        = "The European vertical GPS reference network : Campaign 1997
                      - Concept and status  ",
      year         = "1997",
      note         = "Budapest : TU; Abstr. - Lit. - 1 sv.",
}