| 000 | 00671 a2200253 4500 | ||
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| 003 | ISURu | ||
| 005 | 20240721204829.0 | ||
| 008 | 231003b ce ||||| |||| 00| 0 sin d | ||
| 020 | _a1857028899 | ||
| 041 | _aeng | ||
| 080 |
_a003.29 _bSIN |
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| 100 |
_aSing, Simon _9150235 |
||
| 245 |
_aThe code book _bthe secret history of cods and codebreaking |
||
| 260 |
_aLondon _bFourth estate _c1999 _g1999 |
||
| 300 | _axiii,402 p. | ||
| 650 | 0 |
_aCODES _919364 |
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| 650 | 0 |
_aCODIFICATION _9150237 |
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| 650 | _aCOMMUNICATION | ||
| 650 | _aDOCUMENTATION | ||
| 650 | 0 |
_aSYMBOLS _9150238 |
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| 650 | _aTECHNOLOGY | ||
| 942 |
_cL _2ddc |
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| 945 |
_dMain Library ADMIN _c26318 |
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| 999 |
_c109481 _d137351 |
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