English: Leon Trotsky and Leonid Serebryakov attend the Congress of Soviets of the Soviet Union May 1925 . 18 May 1925 4 Leon Trotsky and Leonid Serebryakov attend the Congress of Soviets of the Soviet Union May 1925

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Photo credit: © The Picture Art Collection / Alamy / Afripics
License: Licensed
Model Released: No

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