6John Plamenatz, German Marxism and Russian Com- munism, Longmans, Green and Co. London, New York, To- ronto, 1954, pp. 165- 167, 169.
7David W. Lovell, From Marx to Lenin, an evolution of Marx' s responsibility for Soviet authoritarianism, Cam- bridge Univ. Press, 1984, p. 73, pp. 84-85.