@book{21192,
	author = {Rocha González, José Juan.},
	title = {Control químico del tizón tardío de la papa Phytophthora infestans (Mont) De Bary en Tetlapayac, Apan, Hgo.},
	publisher = {El autor,},
	year = {1994},
	address = {Chapingo, Méx. :}
}