The concept of custom in international law / [by] Anthony A. D'Amato. Foreword by Richard A. Falk. D'Amato, Anthony A. International law. Customary law, International. KZ3110.D342 A33 1971 341 DAC Bibliography: p. 275-282. Ithaca : Cornell University Press, c 1971 c 1971 1971 Text xvi, 286 p. eng