@book{101480,
	author = {Haveman, Robert H. and Bershadker, Andrew. and ebrary, Inc.},
	title = {Human capital in the United States from 1975 to 2000},
	publisher = {W.E. Upjohn Institute for Employment Research,},
	year = {2003.},
	address = {Kalamazoo, Mich. :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10103867}
}