@book{20973,
	author = {López Ramos, Francisco and Martínez Moreno, Martín.},
	title = {Epidemiología: Enfermedades Transmisibles y Crónico-Degenerativas /},
	publisher = {El Manual Moderno,},
	year = {2006.},
	address = {Mexico :},
	edition = {2.}
}