Title: Vlii︠a︡nie Velikoĭ Okti︠a︡brʹskoĭ sot︠s︡ialisticheskoĭ revoli︠u︡t︠s︡ii na revoli︠u︡t︠s︡ionnoe dvizhenie v Bolgarii
Subjects: History, Influence
Places: Bulgaria, Soviet Union
Time periods: 1878-1944, Revolution, 1917-1921