@book{83835,
	author = {Costa, Dora L. and Kahn, Matthew E., and ebrary, Inc.},
	title = {Heroes & cowards},
	publisher = {Princeton University Press,},
	year = {c2008.},
	series = {NBER series on long-term factors in economic development},
	address = {Princeton :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10417088}
}