@book{9808,
	author = {Böll, Heinrich, 1917-1985},
	title = {Opiniones de un payaso},
	publisher = {Barral Editores},
	year = {1971},
	series = {Libros de enlace},
	address = {Barcelona},
	note = {Incluye datos sobre el autor y la obra},
	url = {https://aullidosdelacalledotnet.files.wordpress.com/2014/08/heinrich-boll-opiniones-de-un-payaso.pdf}
}