@article{10208,
      author       = "Kukkamäki, T. J. and International Association of Geodesy,
                      General Assembly Toronto, Canada - September 1957",
      title        = "General Report on Precise Levelling 1954 - 1956 presented
                      at the General Assembly of IUGG in Toronto September 3 - 14,
                      1957 by  ",
      year         = "1957",
      note         = "1 sv.",
}