@book{297535,
	author = {Vries, T.p.g.m and Henning, R.h.},
	title = {Guia de la buena precripcion / T.P.G.M de Vries...[et.al]},
	publisher = {Organización Mundial de la Salud},
	year = {1998},
	address = {Ginebra}
}