@article{33521,
      author       = "Stegena, L. and International Cartographic Association and
                      International Cartographic Association. Commission III -
                      Automation in Cartography. Working Session and Business
                      Meeting 21-26 August, 1973 Budapest, Hungary",
      title        = "Tools for Automation of Map Generalization: The Filter
                      Theory and the Coding Theory  ",
      year         = "1973",
      note         = "čet. obr. v textu, 1 sv., separáty",
}