Vlii︠a︡nie na Velikata Oktomvriĭska sot︠s︡ialisticheska revoli︠u︡t︠s︡ii︠a︡ v Bŭlgarii︠a︡; preporŭchitelna bibliografii︠a︡Dŭrzhavna biblioteka "Vasil Kolarov"Khristov, KhristoBulgarianBook1957Sofii︠a︡, Nauka i izkustvo, 1957.Bulgaria—History—BibliographySoviet Union—History—Revolution, 1917-1921—Influence—BibliographyBook