Title: X [i.e. Desiatyĭ] sʺezd Bolgarskoĭ kommunisticheskoĭ partii, Sofii︠a︡, 20-25 apreli︠a︡ 1971 g.
Subjects: Communism, Congresses and conventions, Bŭlgarska komunisticheska partii︠a︡. Kongres 1971 : Sofia, Bulgaria), Bŭlgarska komunisticheska partii︠a︡
Places: Bulgaria