@book{305154,
	author = {Porfter, Robert S. },
	title = { El Manual Merck de diagnóstico y tratamiento /},
	publisher = {Editorial Médica Panamericana,},
	year = {2020},
	address = {Ciudad Autónoma de Buenos Aires :},
	edition = {Vigésima edición},
	note = {Título original: Merck Manual of Diagnosis an Therapy.}
}