Title: Dvanadesetii︠a︡t kongres na BKP i aktualnite problemi i zadachi na ideologicheskata rabota
Subjects: Communist Propaganda, Communism, Bŭlgarska komunisticheska partii︠a︡, Study and teaching, Bŭlgarska komunisticheska partii︠a︡. Kongres 1981 : Sofia)
Places: Bulgaria