Title: Iz istorii︠a︡ta na internat︠s︡ionalnite vrŭzki na V.I. Lenin s revoli︠u︡t︠s︡ionnoto rabotnichesko dvizhenie v Bŭlgarii︠a︡, 1896-1923 g.
Subjects: Labor, Labor movement, Working class, Political activity
Places: Bulgaria