00760nam0 2200277 450 991029106010332120181109115340.0978-1-85702-889-820181109d1999---- km y0itay50 baengGB 001yy<<The >>code bookthe secret history of codes and codebreakingSimon SinghLondonFouth Estate1999XIII, 402 p.20 cmCriptografiaCodici cifrati652.822Singh,Simon79243ITUNINAREICATUNIMARCBK991029106010332113 K 61 411869 /2018FINBCFINBCCode book1537136UNINA