@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.", }