@book{64234,
	author = {Silver, Cheryl Simon. and DeFries, Ruth S. and ebrary, Inc.},
	title = {One earth, one future},
	publisher = {National Academy Press,},
	year = {c1990.},
	address = {Washington, D.C. :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10055477}
}