@book{70324,
	author = {Institute of Medicine (U.S.). and ebrary, Inc.},
	title = {Oral contraceptives & breast cancer},
	publisher = {National Academy Press,},
	year = {1991.},
	address = {Washington, D.C. :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10056851}
}