@article{426,
      author       = "Kádár, I. By. and International Cartographic Association
                      and International Cartographic Association. Commision III -
                      Automation in Cartography. Working Session and Business
                      Meeting 21-26 August, 19 73, Budapest, Hungary",
      title        = "A Practical Method for Estimation of Map Information
                      Content..  ",
      year         = "1973",
      note         = "tab. a obr. na příl., 1 sv.",
}