The Socialist Youth Union (, SSM) was a youth organization in Bulgaria, founded in 1921. SSM was the youth wing of the Bulgarian Social Democratic Workers…
The Socialist Youth Union (, SSM) was a youth organization in Bulgaria, founded in 1921. SSM was the youth wing of the Bulgarian Social Democratic Workers Party.Kowalski, Werner. Geschichte der sozialistischen arbeiter-internationale: 1923 - 19. Berlin: Dt. Verl. d. Wissenschaften, 1985. p. 288
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