TY  - BOOK
AU  - Smith,Michael
TI  - Station X: the codebreakers of Bletchley Park 
SN  - 0752221892
PY  - 1998///
CY  - London
PB  - Channel 4 Books
KW  - Great Britain
KW  - Government Communications Headquarters
KW  - World War, 1939-1945
KW  - Cryptography
KW  - Secret service
KW  - Electronic intelligence
KW  - History
N1  - Accompanies the Channel 4 television series
ER  -