Title: Mezhdunarodnai︠a︡ solidarnostʹ trudi︠a︡shchikhsia v borʹbe s nastupleniem reakt︠s︡ii i voennoĭ opasnostʹi︠u︡ (1925-1927)
Subjects: Proletariat, Labor, Communism, History, Sources, Working class
Places: Soviet Union
Time periods: 1917-1936