@book{148007,
	author = {Ehrlich, Paul R. and Ornstein, Robert E. and ebrary, Inc.},
	title = {Humanity on a tightrope},
	publisher = {Rowman & Littlefield :},
	year = {c2010.},
	address = {Lanham, Md. :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10434952}
}