@book{9913,
	author = {Maantay, Juliana, and Ziegler, John,},
	title = {GIS for the urban environment /},
	publisher = {ESRI Press,},
	year = {c2006.},
	address = {Redlands, Calif. :},
	url = {http://www.loc.gov/catdir/toc/ecip0613/2006013778.html}
}