Hart, H. L. A. The concept of law / H. L. A. Hart. - 2nd ed. - New Delhi : Oxford University Press, 1961. - xii, 315 p. : 21 cm. ISBN: 9780195664171 Subjects--Topical Terms: Law and justice (আইন ও বিচার) Legal system.International law. Dewey Class. No.: 340