@article{33331,
      author       = "Burša, Milan and IUGG and XIV. General Assembly of the
                      IUGG, Lucerna 1967",
      title        = "Theoretical and practical achievents in determining the
                      figure of the earth and its external gravitational field
                      1963 - 1967  ",
      year         = "1967",
      note         = "2 x 1 seš., Internatinal Association of Geodesy, Section V
                      - Physical Geodesy. Secretary´s Report.",
}