@book{3849,
	author = {Devine, Theresa J. and Kiefer, Nicholas M., and ebrary, Inc.},
	title = {Empirical labor economics},
	publisher = {Oxford University Press,},
	year = {1991.},
	address = {New York :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10279286}
}