The Cheka : Lenin's political police : the All-Russian Extraordinary Commission for Combating Counter-revolution and Sabotage (December 1917 to February 1922) /
Leggett, George.
Oxford : Clarendon Press,
1981.
Includes bibliography and index.
Russian S.F.S.R. Chrezvychaĭnai︠a︡ komissii︠a︡ po borʹbe s kontr-revoli︠u︡t︠s︡ieĭ i sabotazhem