@book{9920,
	author = {Slocum, Terry A.},
	title = {Thematic cartography and geovisualization /},
	publisher = {Pearson Prentice Hall,},
	year = {c2009.},
	address = {Upper Saddle River, NJ :},
	edition = {3rd ed.},
	url = {http://www.loc.gov/catdir/toc/ecip086/2007049278.html}
}