@book{9822,
	author = {Li, Zhilin, and Zhu, Qing,},
	title = {Digital terrain modeling :},
	publisher = {CRC Press,},
	year = {c2005.},
	address = {New York :},
	url = {http://www.loc.gov/catdir/enhancements/fy0646/2004054578-d.html}
}