@book{13969,
	author = {Ball, Jacqueline A. and Levey, Richard H.},
	title = {Ancient China :},
	publisher = {National Geographic,},
	year = {c2007.},
	address = {Washington, D.C. :},
	url = {http://www.loc.gov/catdir/toc/ fy0705/2006299797.html}
}