@article {Cleveland-1985-GPG,
	author=		"William S. Cleveland and Robert McGill",
	journal=	"Science",
	pages=		"828--833",
	title=		"Graphical Perception and Graphical Methods for Analyzing Scientific Data",
	volume=		"229",
	year=		"1985",
	theme=		"perception",
	project=	"",
	added-by=	"Christina Kennedy",
	date-added=	"Fri October 3 15:25:42 2003"
}
@article {Cleveland-1985-GPG-url,
	author=		"William S. Cleveland and Robert McGill",
	journal=	"Science",
	note=		" \url{http://www.cs.brown.edu/research/vis/results/bibtex/Cleveland-1985-GPG.bib}{(bibtex: Cleveland-1985-GPG)}",
	pages=		"828--833",
	title=		"Graphical Perception and Graphical Methods for Analyzing Scientific Data",
	volume=		"229",
	year=		"1985",
	theme=		"perception",
	project=	"",
	added-by=	"Christina Kennedy",
	date-added=	"Fri October 3 15:25:42 2003"
}