Kelsen, Hans, 1881-1973. Kelsen, Hans, 1881-1973. Principles of international law. - 2nd ed. / rev. and ed. by Robert W. Tucker. 2nd ed. / rev. and ed. by Robert W. Tucker. - New York : Holt, Rinehart & Winston, [1967] First published in 1966. Subjects--Topical Terms: International law.