Title: Nauchna konferent︠s︡ii︠a︡, posvetena na 40-godishninata ot pobedata na Devetoseptemvriĭskata sot︠s︡ialisticheska revoli︠u︡t︠s︡ii︠a︡ v Bŭlgarii︠a︡
Subjects: Communism, Congresses, History
Places: Bulgaria