@InProceedings{SCI:Wil92a,
  author =    "C. Williams and J. Rasure and C.D. Hansen",
  title =     "The State of the Art of Visual Languages for
              Visualization",
  booktitle = "Visualization 1992",
  pages =     "202--209",
  year =      "1992",
  month =     "October",
  location =  "Boston, Ma.",
}