@book{36991,
	author = {Riegelman, Richard K. and Hirsch, Robert.},
	title = {Como estudiar un estudio y probar una prueba :},
	publisher = {Organizacion Panamericana de la Salud OPS,},
	year = {1992.},
	series = {Publicacion Cientifica ;},
	address = {Washington :},
	edition = {2a ed.},
	note = {Incluye Glosario (p. 241-250)}
}