@book{172013,
	author = {Parnell, Allan M. and ebrary, Inc.},
	title = {Contraceptive use and controlled fertility},
	publisher = {National Academy Press,},
	year = {1989.},
	address = {Washington, D.C. :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10056850}
}