Period 1846-1854
Correspondence with Julius Braunthal 1965-1967, Isaac Deutscher 1951-1966, Karl Korsch 1950-1954, Paul Mattick 1964-1967, Otto Morf 1952-1967, Solomon S. Švarc 1949-1967 and others; manuscripts and typescripts 1929-1966, including his doctoral thesis `Friedrich Engels und das Problem der geschichtsl...
Other Authors: ';
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Rosdolsky,
Roman,...
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