@book{30452,
	author = {Chang, Kang-Tsung.},
	title = {Introduction to geographic information systems /},
	publisher = {McGraw-Hill,},
	year = {2010.},
	address = {New Yor :},
	edition = {5th ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0909/2008028920-b.html}
}