@book{175,
	author = {Porter, Robert S.},
	title = {El manual Merck de diagnóstico y tratamiento /},
	publisher = {Médica Panamericana,},
	year = {2014.},
	address = {Buenos Aires:},
	edition = {20 ed. --},
	url = {https://www.medicapanamericana.com/es-GT/profile/general}
}