@book{18813,
	author = {Centro de Investigaciones Agropecuarias Santa Elena. Toluca, Méx.},
	title = {Memorias, 19 -},
	publisher = {El Centro,},
	year = {19 -},
	series = {Ciclo de seminarios},
	address = {Toluca, Méx. :},
	note = {La biblioteca tiene: 1972}
}