@book {Bertin-1983-SOG,
	author=		"J. Bertin",
	publisher=	"University of Wisconsin Press",
	title=		"Semiology of Graphics",
	year=		"1983",
	theme=		"tech and vr and perception and natural and medicine and art",
	project=	"genetic",
	added-by=	"Daniel Acevedo",
	date-added=	"Thu June 27 12:45:17 2002"
}
@book {Bertin-1983-SOG-url,
	author=		"J. Bertin",
	note=		" \url{http://vis.cs.brown.edu/results/bibtex/Bertin-1983-SOG.bib}{(bibtex: Bertin-1983-SOG)}",
	publisher=	"University of Wisconsin Press",
	title=		"Semiology of Graphics",
	year=		"1983",
	theme=		"tech and vr and perception and natural and medicine and art",
	project=	"genetic",
	added-by=	"Daniel Acevedo",
	date-added=	"Thu June 27 12:45:17 2002"
}