WRight OppositionWNikolai BukharinWCommunist Party of Germany (Opposition)WBenjamin GitlowWWill HerbergWJay LovestoneWLovestoneitesWPOUMWM. N. RoyWAlexei RykovWSocialist Party (Sweden, 1929)WAugust ThalheimerWMikhail TomskyWNikolai UglanovWBertram WolfeWCharles S. Zimmerman
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