Title: Po zovu sovesti
Subjects: World War, 1939-1945, Underground movements, Soviet Reconnaissance operations, Soviet Personal narratives, History
Places: Russia (Federation), Tverskai︠a︡ oblastʹ, Tverskai︠a︡ oblastʹ (Russia)
People: Nikolaĭ Ershov (1927-)
Time periods: 20th century