The ruling class (Elementi di scienze politica) / by Gaetano Mosca ; translated by Hannah D. Kahn ; edited and revised, with an introduction by Arthur Livingston. Elementi di scienza politica. English Mosca, Gaetano, 1858-1941. Kahn, Hannah D. Livingston, Arthur, 1883-1944. Political science. JC265 .M62 321.4 MOR Translation of Elementi di scienze politica. Includes bibliographical references and index. New York ; London : McGraw-Hill Book, 1939. 1939. 1939 Text xli, 514 p. : eng eng ita