Hart, H. L. A. The concept of law / H. L. A. Hart introduction by Leslie Green series editor Paul Craig - 3rd ed. - New Delhi : Oxford University Press, c2012. - lv, 333 p. ; 22 cm. - Clarendon law series . ISBN: 9780198729990 LCCN: Subjects--Topical Terms: JurisprudencePhilosophyLaw LC Class. No.: K237 / .H3 2012