Germany Since 1918, 1971, 2d review edition, 1980. Marx and the Marxists, 1973.
Britain Since 1945, 1979, 2d, review edition, 1986. German Democratic Republic: Moscow's German Ally, 1983, The East German Economy to 1990, 1987. Co-author: West Germany: Politics and Society, 1981, 2d, review edition, 1982.
Also articles. Editor: The Changing Face of Western Communism, 1980. Honecker's Germany, 1985. Former member national council European Movement, United Kingdom British Council-Hamburg University study scholar Hamburg University, 1956-1957.
German Academy Exchange Service scholar, Federal Republic Germany, 1983.