@article{4412,
      author       = "Pellinen, L. P. and XII Assemblée Génerale de l'UGGI a
                      Helsinki, 1960",
      title        = "The Computation of Triangulation by the Projection - Method
                      and the Corresponding Accuracy Required of the Heights above
                      the Reference Ellipsoid  ",
      year         = "1960",
      note         = "1 sv.",
}