@book{9894,
	author = {Wing, Michael G. and Bettinger, Pete,},
	title = {Geographic information systems :},
	publisher = {Oxford University Press,},
	year = {2008.},
	address = {New York :},
	edition = {2nd ed.},
	note = {Previous eds. by Pete Bettinger and Michael G. Wing.},
	url = {http://www.loc.gov/catdir/enhancements/fy0907/2008301134-b.html}
}