@book{8200,
	author = {Usandizaga Beguiristain, José Antonio. and De la Fuente Pérez, Pedro.},
	title = {Tratado de obstetricia y ginecología /},
	publisher = {McGraw-Hill,},
	year = {1997.},
	address = {Madrid :},
	note = {Incluye indice.}
}