@book{548419,
	author = {Verbyla, David L.},
	title = {Practical GIS analysis /},
	publisher = {Taylor & Francis,},
	year = {2002.},
	address = {London ;},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/enhancements/fy0646/2005280445-d.html}
}