TY - BOOK A1 - Lenin, V. I. T1 - Materialism and Empiro-Criticism, Moskau (Foreign Languages Publishing House) 1952. Y1 - 1952 ER - TY - BOOK A1 - Lenin, V. I. T1 - State and revolution, New York (International Publishers) 1932. Y1 - 1932 N1 - Notes in the copy ER -