"The Voices of the Dead : Stalin's Great Terror in the 1930s / H. Kuromiya. - Bury st Edmunds, 2007. - p. 220" . "The Polska Organizacja Wojskowa was founded by Marshal Józef Piłsudski, the future chief of independent Poland. Its main function had been intelligence-gathering and sabotage."@eng . "Polska Organizacja Wojskowa"@eng . .