@article{4555,
      author       = "Sigl, Rudolf",
      title        = "Continental Networks. Report on the Activities of the IAG -
                      Commission X 1975 to 1979. Presented to the International
                      Association of Geodesy on the I.U.G.G. General assembly,
                      December 2 - 15, 1979, Canberra/Australia  ",
      year         = "1979",
      note         = "1 sv.",
}