@book{90920,
	author = {Jones, A. L. and Aldwinckle, H.S.},
	title = {Plagas y enfermedades del manzano y del peral},
	publisher = {Mundi-Prensa,},
	year = {2002},
	address = {Madrid :},
	note = {Compendium of apple and pear diseases, 1999}
}