000 00374nam a2200133Ia 4500
999 _c30556
_d30556
008 190711s9999 xx 000 0 und d
020 _a052181054X
082 _a621.38196428 C561
100 _aChurchhouse, R. F.
245 0 _aCodes and Ciphers
_bJulius Caesar, the Enigma, and the Internet
260 _aCambridge
_bCUP
_c2002
300 _ax+240p., 23X15Cms.
942 _cBK