Stalin's secret police :  a history of the CHEKA, OGPU, NKVD, SMERSH & KGB : 1917-1991 / 
Rupert Butler. 
 - Amber pbk. ed. 
 - London :  Amber Books,  2015. 
<br/><br/><label>ISBN: </label>1782743170 9781782743170 9781782743517 
<br/><br/><label>Subjects--Personal Names: </label><br/>Stalin, Iosif Vissarionovič (1878-1953).