LEADER 00000nam 2200241 a 4500
001 1857028899
007 t
008 020103r20001999enk r 000 eng d
020 1857028899
040 CURLBL
050 4 Z 103 S6
100 1 Singh, Simon.
245 14 The code book :|bthe secret history of codes and code-
breaking.
260 London :|bFourth Estate,|c2000.
300 402p.
650 0 Cryptography.
650 0 Cryptography|xHistory.
650 0 Ciphers.
650 0 Data encryption (Computer science)
650 0 Confidential communications.
|