@book{40530,
	author = {ENA. Colegio de Postgraduados. Chapingo, Méx. Rama de Fitopatología},
	title = {Informe anual, 19 -},
	publisher = {ENA,},
	year = {19 -},
	address = {Chapingo, Méx. :},
	note = {La biblioteca tiene : 1973}
}