Title: Sedʹmai︠a︡ (aprelʹskai︠a︡) Vserossiĭskai︠a︡ konferent︠s︡ii︠a︡ RSDRP (bolʹshevikov), Petrogradskaia obshchegorodskaia konferentsiia RSDRP (bolʹshevikov) aprelʹ 1917 goda
Subjects: Communism, Congresses
Places: Russia