Harrison, Jonathan. Our knowledge of right and wrong. - London, New York, Allen and Unwin; Humanities Press, 1971. - 407 p. 23 cm. - Muirhead library of philosophy . - Library of philosophy. . Includes bibliographical references. ISBN: 0391000969 (Humanities) Source: �?�?�4.00 LCCN: 70853174 Nat. Bib. No.: B71-15632 Subjects--Topical Terms: Ethics. LC Class. No.: BJ1012 / .H32 1971 Dewey Class. No.: 170