Title: ChK na Ukraine
Subjects: History, Russian S.F.S.R., Russian S.F.S.R. Chrezvychaĭnai︠a︡ komissii︠a︡ po borʹbe s kontr-revoli︠u︡t︠s︡ieĭ i sabotazhem, Secret service, Sources, Ukraine. Chrezvychaĭnai͡a komissii͡a po borʹbe s kontr-revoli͡ut͡sieĭ i sabotazhem
Places: Ukraine
Time periods: Revolution, 1917-1921