Title: Neizvestnai︠a︡ blokada
Subjects: History, Politics and government, Sources, Soviet Union, Soviet Union. Komitet gosudarstvennoĭ bezopasnosti, Soviet Union. Narodnyĭ komissariat vnutrennikh del
Places: Saint Petersburg (Russia), Soviet Union
Time periods: 1936-1953, Siege, 1941-1944