@book{39268,
	author = {Costa, Dora L. and ebrary, Inc.},
	title = {The evolution of retirement},
	publisher = {University of Chicago Press,},
	year = {1998.},
	series = {NBER series on long-term factors in economic development},
	address = {Chicago :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10230020}
}