Title: Sedʹmai͡a (aprelʹskai͡a) Vserossiĭskai͡a konferent͡sii͡a RSDRP (bolʹshevikov) ; Petrogradskai͡a obshchegorodskai͡a konferent͡sii͡a RSDRP (bolʹshevikov), aprelʹ 1917 goda
Subjects: Communism, Congresses
Places: Soviet Union