@article{4463,
      author       = "Peucker, Thomas K. and 6th Technical Conference,
                      International Cartographic Association, Ottawa, August 1972",
      title        = "The Computer Version of Three Relief Representation  ",
      year         = "1972",
      note         = "Paper tabled at., The support of the National Research
                      Council of Canada is acknowledged., 1 seš.",
}