@book{171234,
	author = {Adler, Alfred,   and Solana Alonso, Guillermo,},
	title = {El Sentido de la vida },
	publisher = {Espasa-Calpe, },
	year = {1975. },
	series = {Colección Austral},
	address = {España : },
	edition = {1a ed.}
}