Title: Ot prot͡s︡esa v Laĭpt͡s︡ig do lagerite v Sibir
Subjects: Biography, History, Political prisoners, Politics and government
Places: Bulgaria, Russia (Federation), Siberia, Siberia (Russia)
People: Blagoĭ Popov (1902-)
Time periods: 1878-1944, 1917-