@book{165841,
	author = {ebrary, Inc.},
	title = {Grasslands and grassland sciences in northern China},
	publisher = {National Academy Press,},
	year = {1992.},
	address = {Washington, D.C. :},
	note = {"S-525"--T.p. verso.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10055076}
}