@article{26257,
      author       = "Heus, Henk de and FIG and Meeting of FIG Study Group 5B
                      Survey Control Networks, 7th-9th July 1982, Aalborg",
      title        = "Quality Related Problems of Densification Networks  ",
      year         = "1982",
      note         = "Obr. v textu. - Liter., 1 sv.",
}