@article{12667,
      author       = "Worth, Ch. and Board, Ch. and 9. mezinár. konf. kart.,
                      Rockville, Md. 1978 - ICA",
      title        = "The importance of Pilot Studies in the comparative
                      evaluation of thematic Mappings methods: A case study of
                      Three - dimensional views and Choropleth maps produced on
                      the Calcomp 1670 microfilm plotter  ",
      year         = "1978",
      note         = "1 seš.",
}