Title: Sprava "Polʹsʹkoï Orhanizat︠s︡iï Viĭsʹkovoï" v Ukraïni, 1920-1938 rr
Subjects: Sources, History, Espionage, Polska Organizacja Wojskowa, Polish people, Conspiracy theories, Crimes against, Political persecution, Foreign relations, World War, 1914-1918, Underground movements
Places: Ukraine, Soviet Union
Time periods: 20th century