@article{1390,
      author       = "Vondrák, Jan and VÚGTK and XVI. General Assembly of the
                      IUGG, Grenoble, France, 1975",
      title        = "Analysis of Circumzenithal Observations at the Geodetical
                      Observatory Pecný  ",
      year         = "1975",
      note         = "3x1 sv.",
}