Kostov, Vladimir <br/><br/>
The Bulgarian umbrella :  the Soviet direction and operations of the Bulgarian Secret Service in Europe / 
Vladimir Kostov translated by Ben Reynods 
 - Harvester Wheatsheaf :  St. Martin's Press,  1988 
 - 204 p. ;  22 cm. 
<br/><br/><label>ISBN: </label>0710812299 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Espionage, Bulgarian--Biography