@book{91491,
	author = {Londoño Fernández, Juan Luis,},
	title = {Metodologia de la investigacion epidemiologica},
	publisher = {Editorial Universidad de Antioquia,},
	year = {1995.},
	address = {Medellín :},
	edition = {2ed.},
	note = {Compra:Diego Pareja:Oct/96.}
}