00381nam a2200157Ia 450000100060000000800410000602000180004704000130006508200190007810000190009724500510011626000090016730000110017654600070018765000290019411832140331s9999    xx            000 0 und d  a0-7176-2314-x  cPK-LaUMT  a 793.74bSHA-C  aShasha, Dennis  aCodes, puzzles, and conspiracycShasha, Dennis  c1992  a241 p.  aEN  aMathematical recreations