Léon Blum, French socialism, and the Popular Front : a case of international contradictions /"Neue Sachlichkeit" and the world war.International communism in the era of Lenin : a documentary history /Paul Levi and the Comintern.The political-ethical mission of German expressionism.Willi Münzenberg's German communist propaganda empire 1921-1933.International communism in the era of Lenin. A documentary history. [Tome 1].Soviet Russia masters the Comintern.Willi Münzenberg: Propagandist for and against the Comintern.Willi Münzenberg : propagandist for and against the Comintern /Red Vienna : experiment in working-class culture, 1919-1934 /