TY  - BOOK
AU  - Lewin,Ronald
TI  - The other Ultra
SN  - 0091474701 :
AV  - D810.C88 L58
PY  - 1982///
CY  - London
PB  - Hutchinson
KW  - World War, 1939-1945
KW  - Cryptography
N1  - Includes index; Bibliography: p. 309-311
ER  -