TY  - BOOK
AU  - Syrett,David
TI  - The battle of the Atlantic and signals intelligence: U-boat situations and trends, 1941-1945 
SN  - 1840142952
PY  - 1998///
CY  - Aldershot
PB  - Ashgate
KW  - World War, 1939-1945
KW  - Cryptography
KW  - Military intelligence
KW  - Naval operations
KW  - Submarine
KW  - Naval operations, German
KW  - Campaigns
KW  - Atlantic Ocean
ER  -