Leggett, George <br/><br/>
The Cheka :  Lenin's political police the all-Russian extraordinary commission for combating counter-revolution and sabotage (December 1917 to February 1922) / 
by George Leggett. 
 - Oxford :  Clarendon Press,  1981. 
 - 514 p. ;  22 cm. 
<br/><br/>Bibliography : p.(469)-490. 
<br/><br/><label>ISBN: </label>0198225520