@book{70102,
	author = {Madison, Bernard L. and Hart, Therese A. and ebrary, Inc.},
	title = {A challenge of numbers},
	publisher = {National Academy Press,},
	year = {1990.},
	address = {Washington, D.C. :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10056728}
}