Weil, Simone, 1909-1943. The need for roots; prelude to a declaration of duties towards mankind. - London, Routledge & Paul [1952] - 288 p. 23 cm. LCCN: 52002621 Subjects--Topical Terms: Social ethics.Social psychology. Subjects--Index Terms: Lasky collection LC Class. No.: HM216 / .W352