15th Congress of the All-Union Communist Party (Bolsheviks) held during 2–19 December 1927 in
15th Congress of the All-Union Communist Party (Bolsheviks) held during 2–19 December 1927 in Moscow. Front row from left to right:Mykola Skrypnyk (1872–1933) Joseph Stalin (1878–1953)Yemelyan Yaroslavsky (1878–1943) -- source link
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