Parapluie bulgare - Kostov, Vladimir (Stock, [Paris], 1986)
Includes bibliographies.
HU OSA 300 - RFE/RL collection
Keywords: Kostov, Vladimir; Spies -- Bulgaria -- Biography; Espionage -- Bulgaria -- History -- 20th century; Espionage -- Soviet Union -- History; Espionage -- France -- History -- 20th century