Columbia subject headings:
Harvard subject headings:
Russian S.F.S.R. Chrezvychaĭnai︠a︡ komissii︠a︡ po borʹbe s kontr-revoli︠u︡t︠s︡ieĭ i sabotazhem
Soviet Union. Obʺedinennoe gosudarstvennoe politicheskoe upravlenie.
Princeton subject headings:
Russian S.F.S.R. Chrezvychaĭnai︠a︡ komissii︠a︡ po borʹbe s kontr-revoli︠u︡t︠s︡ieĭ i sabotazhem
Secret service--Soviet Union--History--Sources.
Soviet Union--History--1917-1936--Sources.
Soviet Union. Gosudarstvennoe politicheskoe upravlenie.
Ukraine--History--Revolution, 1917-1921--Secret service.