@article{10209,
      author       = "Waalewijn, A. and International Union of Geodesy and
                      Geophysics - XII General Assembly Helsinki 25 July - 6
                      August 1960",
      title        = "General Report on Precise Levelling 1957 - 1959  ",
      year         = "1960",
      note         = "1 sv.",
}