@book{3308,
	author = {Lora León, Lizbeth and Monroy García, Liliana},
	title = {Posible Contaminación Bacteriana de Vacunas Virales de Uso Aviar (Pollos de Engorde) /},
	publisher = {Universidad Nacional de Colombia,},
	year = {1994.},
	address = {Bogotá :}
}