| ID | 028862 |
| Call Number | 364.131/WIN |
| Title Proper | Ultra secret |
| Language | ENG |
| Author | Winterbotham, F W |
| Publication | London, Weidenfeld and Nicolson, 1974. |
| Description | xiii, 199p.+ 16 cm. |
| Classification Number | 364.131 |
| Key Words | Intelligence Service ; Espionage |