Penny Rheingans.
  <b>Color, Change, and Control for Quantitative Data Display</b>.
  In <i>Proceedings of IEEE Visualization</i>, pages 252-258, 1992.
  <A HREF="http://vis.cs.brown.edu/docs/pdf/bib/g/Rheingans-1992-CCC.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Rheingans-1992-CCC.bib">(bibtex:
  Rheingans-1992-CCC)</A>.<br />