@book{205670,
	author = {Kippley, John F. and Kippley, Sheila.},
	title = {El arte de la planificación natural de la familia},
	publisher = {Liga de Pareja a Pareja},
	year = {1998.},
	address = {Cincinnati, OH},
	edition = {Ed. abreviada.},
	note = {Translation of:The art of natural family planning.}
}