THE SOCIALIST LEFT AND THE GERMAN REVOLUTION: A HISTORY OF THE GERMAN INDEPENDENT SOCIAL DEMOCRATIC PARTY, 1917–1922. By David W. Morgan. (Ithaca, N.Y.: Cornell University Press, 1975. Pp. 499. $19.50.) - USPD UND INTERNATIONALE: SOZIALISTISCHER INTERNATIONALISMS IN DER ZEIT DER REVOLUTION. By Robert F. Wheeler. Translated by Agnes Blansdorf. (Frankfurt a.M.: Ullstein, 1975. Pp. 388. DM 58.) - USPD: ZUR GESCHICHTE DER UNABHÄNGIGEN SOZIALDEMOKRATISCHEN PARTEI DEUTSCHLANDS. By Hartfrid Krause. (Frankfurt a.M.: Europäische Verlagsanstalt, 1975. Pp. 397. Paper DM 36.)