TY  - BOOK
AU  - Kostov,Vladimir
TI  - The Bulgarian umbrella: the Soviet direction and operations of the Bulgarian Secret Service in Europe 
SN  - 0710812299
PY  - 1988///
CY  - Harvester Wheatsheaf
PB  - St. Martin's Press
KW  - Espionage, Bulgarian
KW  - Biography
ER  -