Title: Sedʹmai︠a︡ (aprelʹskai︠a︡) Vserossiĭskai︠a︡ konferent︠s︡ii︠a︡ RSDRP (bolʹshevikov) ; Petrogradskai︠a︡ obshchegorodskai︠a︡ konferent︠s︡ii︠a︡ RSDRP (bolʹshevikov), aprelʹ 1917 goda
Subjects: Communism, Congresses
Places: Soviet Union